640157440

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:155

約数の個数: 288

約数和(自身を含む): 1829592576

約数和(自身を除く): 1189435136

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 31, 32, 34, 40, 52, 62, 64, 65, 68, 73, 80, 85, 104, 124, 128, 130, 136, 146, 155, 160, 170, 208, 221, 248, 256, 260, 272, 292, 310, 320, 340, 365, 403, 416, 442, 496, 520, 527, 544, 584, 620, 640, 680, 730, 806, 832, 884, 949, 992, 1040, 1054, 1088, 1105, 1168, 1240, 1241, 1280, 1360, 1460, 1612, 1664, 1768, 1898, 1984, 2015, 2080, 2108, 2176, 2210, 2263, 2336, 2480, 2482, 2635, 2720, 2920, 3224, 3328, 3536, 3796, 3968, 4030, 4160, 4216, 4352, 4420, 4526, 4672, 4745, 4960, 4964, 5270, 5440, 5840, 6205, 6448, 6851, 7072, 7592, 7936, 8060, 8320, 8432, 8840, 9052, 9344, 9490, 9920, 9928, 10540, 10880, 11315, 11680, 12410, 12896, 13702, 14144, 15184, 16120, 16133, 16640, 16864, 17680, 18104, 18688, 18980, 19840, 19856, 21080, 21760, 22630, 23360, 24820, 25792, 27404, 28288, 29419, 30368, 32240, 32266, 33728, 34255, 35360, 36208, 37960, 38471, 39680, 39712, 42160, 45260, 46720, 49640, 51584, 54808, 56576, 58838, 60736, 64480, 64532, 67456, 68510, 70720, 72416, 75920, 76942, 79424, 80665, 84320, 90520, 93440, 99280, 103168, 109616, 117676, 121472, 128960, 129064, 134912, 137020, 141440, 144832, 147095, 151840, 153884, 158848, 161330, 168640, 181040, 192355, 198560, 219232, 235352, 242944, 257920, 258128, 274040, 282880, 289664, 294190, 303680, 307768, 317696, 322660, 337280, 362080, 384710, 397120, 438464, 470704, 500123, 515840, 516256, 548080, 579328, 588380, 607360, 615536, 645320, 674560, 724160, 769420, 794240, 876928, 941408, 1000246, 1032512, 1096160, 1176760, 1214720, 1231072, 1290640, 1448320, 1538840, 1588480, 1753856, 1882816, 2000492, 2065024, 2192320, 2353520, 2462144, 2500615, 2581280, 2896640, 3077680, 3765632, 4000984, 4130048, 4384640, 4707040, 4924288, 5001230, 5162560, 6155360, 7531264, 8001968, 8769280, 9414080, 9848576, 10002460, 10325120, 12310720, 16003936, 18828160, 20004920, 20650240, 24621440, 32007872, 37656320, 40009840, 49242880, 64015744, 80019680, 128031488, 160039360, 320078720, 640157440]

約数ペア:

[(1, 640157440), (2, 320078720), (4, 160039360), (5, 128031488), (8, 80019680), (10, 64015744), (13, 49242880), (16, 40009840), (17, 37656320), (20, 32007872), (26, 24621440), (31, 20650240), (32, 20004920), (34, 18828160), (40, 16003936), (52, 12310720), (62, 10325120), (64, 10002460), (65, 9848576), (68, 9414080), (73, 8769280), (80, 8001968), (85, 7531264), (104, 6155360), (124, 5162560), (128, 5001230), (130, 4924288), (136, 4707040), (146, 4384640), (155, 4130048), (160, 4000984), (170, 3765632), (208, 3077680), (221, 2896640), (248, 2581280), (256, 2500615), (260, 2462144), (272, 2353520), (292, 2192320), (310, 2065024), (320, 2000492), (340, 1882816), (365, 1753856), (403, 1588480), (416, 1538840), (442, 1448320), (496, 1290640), (520, 1231072), (527, 1214720), (544, 1176760), (584, 1096160), (620, 1032512), (640, 1000246), (680, 941408), (730, 876928), (806, 794240), (832, 769420), (884, 724160), (949, 674560), (992, 645320), (1040, 615536), (1054, 607360), (1088, 588380), (1105, 579328), (1168, 548080), (1240, 516256), (1241, 515840), (1280, 500123), (1360, 470704), (1460, 438464), (1612, 397120), (1664, 384710), (1768, 362080), (1898, 337280), (1984, 322660), (2015, 317696), (2080, 307768), (2108, 303680), (2176, 294190), (2210, 289664), (2263, 282880), (2336, 274040), (2480, 258128), (2482, 257920), (2635, 242944), (2720, 235352), (2920, 219232), (3224, 198560), (3328, 192355), (3536, 181040), (3796, 168640), (3968, 161330), (4030, 158848), (4160, 153884), (4216, 151840), (4352, 147095), (4420, 144832), (4526, 141440), (4672, 137020), (4745, 134912), (4960, 129064), (4964, 128960), (5270, 121472), (5440, 117676), (5840, 109616), (6205, 103168), (6448, 99280), (6851, 93440), (7072, 90520), (7592, 84320), (7936, 80665), (8060, 79424), (8320, 76942), (8432, 75920), (8840, 72416), (9052, 70720), (9344, 68510), (9490, 67456), (9920, 64532), (9928, 64480), (10540, 60736), (10880, 58838), (11315, 56576), (11680, 54808), (12410, 51584), (12896, 49640), (13702, 46720), (14144, 45260), (15184, 42160), (16120, 39712), (16133, 39680), (16640, 38471), (16864, 37960), (17680, 36208), (18104, 35360), (18688, 34255), (18980, 33728), (19840, 32266), (19856, 32240), (21080, 30368), (21760, 29419), (22630, 28288), (23360, 27404), (24820, 25792)]