1640065280

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:445

約数の個数: 216

約数和(自身を含む): 4641678720

約数和(自身を除く): 3001613440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 79, 80, 98, 112, 128, 140, 158, 160, 196, 224, 245, 256, 280, 316, 320, 331, 392, 395, 448, 490, 553, 560, 632, 640, 662, 784, 790, 896, 980, 1106, 1120, 1264, 1280, 1324, 1568, 1580, 1655, 1792, 1960, 2212, 2240, 2317, 2528, 2648, 2765, 3136, 3160, 3310, 3871, 3920, 4424, 4480, 4634, 5056, 5296, 5530, 6272, 6320, 6620, 7742, 7840, 8848, 8960, 9268, 10112, 10592, 11060, 11585, 12544, 12640, 13240, 15484, 15680, 16219, 17696, 18536, 19355, 20224, 21184, 22120, 23170, 25280, 26149, 26480, 30968, 31360, 32438, 35392, 37072, 38710, 42368, 44240, 46340, 50560, 52298, 52960, 61936, 62720, 64876, 70784, 74144, 77420, 81095, 84736, 88480, 92680, 101120, 104596, 105920, 123872, 129752, 130745, 141568, 148288, 154840, 162190, 176960, 183043, 185360, 209192, 211840, 247744, 259504, 261490, 296576, 309680, 324380, 353920, 366086, 370720, 418384, 423680, 495488, 519008, 522980, 593152, 619360, 648760, 707840, 732172, 741440, 836768, 915215, 990976, 1038016, 1045960, 1238720, 1281301, 1297520, 1464344, 1482880, 1673536, 1830430, 2076032, 2091920, 2477440, 2562602, 2595040, 2928688, 2965760, 3347072, 3660860, 4152064, 4183840, 4954880, 5125204, 5190080, 5857376, 6406505, 6694144, 7321720, 8367680, 10250408, 10380160, 11714752, 12813010, 14643440, 16735360, 20500816, 20760320, 23429504, 25626020, 29286880, 33470720, 41001632, 46859008, 51252040, 58573760, 82003264, 102504080, 117147520, 164006528, 205008160, 234295040, 328013056, 410016320, 820032640, 1640065280]

約数ペア:

[(1, 1640065280), (2, 820032640), (4, 410016320), (5, 328013056), (7, 234295040), (8, 205008160), (10, 164006528), (14, 117147520), (16, 102504080), (20, 82003264), (28, 58573760), (32, 51252040), (35, 46859008), (40, 41001632), (49, 33470720), (56, 29286880), (64, 25626020), (70, 23429504), (79, 20760320), (80, 20500816), (98, 16735360), (112, 14643440), (128, 12813010), (140, 11714752), (158, 10380160), (160, 10250408), (196, 8367680), (224, 7321720), (245, 6694144), (256, 6406505), (280, 5857376), (316, 5190080), (320, 5125204), (331, 4954880), (392, 4183840), (395, 4152064), (448, 3660860), (490, 3347072), (553, 2965760), (560, 2928688), (632, 2595040), (640, 2562602), (662, 2477440), (784, 2091920), (790, 2076032), (896, 1830430), (980, 1673536), (1106, 1482880), (1120, 1464344), (1264, 1297520), (1280, 1281301), (1324, 1238720), (1568, 1045960), (1580, 1038016), (1655, 990976), (1792, 915215), (1960, 836768), (2212, 741440), (2240, 732172), (2317, 707840), (2528, 648760), (2648, 619360), (2765, 593152), (3136, 522980), (3160, 519008), (3310, 495488), (3871, 423680), (3920, 418384), (4424, 370720), (4480, 366086), (4634, 353920), (5056, 324380), (5296, 309680), (5530, 296576), (6272, 261490), (6320, 259504), (6620, 247744), (7742, 211840), (7840, 209192), (8848, 185360), (8960, 183043), (9268, 176960), (10112, 162190), (10592, 154840), (11060, 148288), (11585, 141568), (12544, 130745), (12640, 129752), (13240, 123872), (15484, 105920), (15680, 104596), (16219, 101120), (17696, 92680), (18536, 88480), (19355, 84736), (20224, 81095), (21184, 77420), (22120, 74144), (23170, 70784), (25280, 64876), (26149, 62720), (26480, 61936), (30968, 52960), (31360, 52298), (32438, 50560), (35392, 46340), (37072, 44240), (38710, 42368)]