20438880

素因数分解:

$2^5\times 3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1$

素因数の和:122

約数の個数: 288

約数和(自身を含む): 82736640

約数和(自身を除く): 62297760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 16, 20, 21, 22, 24, 28, 30, 32, 33, 35, 40, 42, 44, 48, 49, 55, 56, 60, 66, 70, 77, 79, 80, 84, 88, 96, 98, 105, 110, 112, 120, 132, 140, 147, 154, 158, 160, 165, 168, 176, 196, 210, 220, 224, 231, 237, 240, 245, 264, 280, 294, 308, 316, 330, 336, 352, 385, 392, 395, 420, 440, 462, 474, 480, 490, 528, 539, 553, 560, 588, 616, 632, 660, 672, 735, 770, 784, 790, 840, 869, 880, 924, 948, 980, 1056, 1078, 1106, 1120, 1155, 1176, 1185, 1232, 1264, 1320, 1470, 1540, 1568, 1580, 1617, 1659, 1680, 1738, 1760, 1848, 1896, 1960, 2156, 2212, 2310, 2352, 2370, 2464, 2528, 2607, 2640, 2695, 2765, 2940, 3080, 3160, 3234, 3318, 3360, 3476, 3696, 3792, 3871, 3920, 4312, 4345, 4424, 4620, 4704, 4740, 5214, 5280, 5390, 5530, 5880, 6083, 6160, 6320, 6468, 6636, 6952, 7392, 7584, 7742, 7840, 8085, 8295, 8624, 8690, 8848, 9240, 9480, 10428, 10780, 11060, 11613, 11760, 12166, 12320, 12640, 12936, 13035, 13272, 13904, 15484, 16170, 16590, 17248, 17380, 17696, 18249, 18480, 18960, 19355, 20856, 21560, 22120, 23226, 23520, 24332, 25872, 26070, 26544, 27808, 30415, 30968, 32340, 33180, 34760, 36498, 36960, 37920, 38710, 41712, 42581, 43120, 44240, 46452, 48664, 51744, 52140, 53088, 58065, 60830, 61936, 64680, 66360, 69520, 72996, 77420, 83424, 85162, 86240, 88480, 91245, 92904, 97328, 104280, 116130, 121660, 123872, 127743, 129360, 132720, 139040, 145992, 154840, 170324, 182490, 185808, 194656, 208560, 212905, 232260, 243320, 255486, 258720, 265440, 291984, 309680, 340648, 364980, 371616, 417120, 425810, 464520, 486640, 510972, 583968, 619360, 638715, 681296, 729960, 851620, 929040, 973280, 1021944, 1277430, 1362592, 1459920, 1703240, 1858080, 2043888, 2554860, 2919840, 3406480, 4087776, 5109720, 6812960, 10219440, 20438880]

約数ペア:

[(1, 20438880), (2, 10219440), (3, 6812960), (4, 5109720), (5, 4087776), (6, 3406480), (7, 2919840), (8, 2554860), (10, 2043888), (11, 1858080), (12, 1703240), (14, 1459920), (15, 1362592), (16, 1277430), (20, 1021944), (21, 973280), (22, 929040), (24, 851620), (28, 729960), (30, 681296), (32, 638715), (33, 619360), (35, 583968), (40, 510972), (42, 486640), (44, 464520), (48, 425810), (49, 417120), (55, 371616), (56, 364980), (60, 340648), (66, 309680), (70, 291984), (77, 265440), (79, 258720), (80, 255486), (84, 243320), (88, 232260), (96, 212905), (98, 208560), (105, 194656), (110, 185808), (112, 182490), (120, 170324), (132, 154840), (140, 145992), (147, 139040), (154, 132720), (158, 129360), (160, 127743), (165, 123872), (168, 121660), (176, 116130), (196, 104280), (210, 97328), (220, 92904), (224, 91245), (231, 88480), (237, 86240), (240, 85162), (245, 83424), (264, 77420), (280, 72996), (294, 69520), (308, 66360), (316, 64680), (330, 61936), (336, 60830), (352, 58065), (385, 53088), (392, 52140), (395, 51744), (420, 48664), (440, 46452), (462, 44240), (474, 43120), (480, 42581), (490, 41712), (528, 38710), (539, 37920), (553, 36960), (560, 36498), (588, 34760), (616, 33180), (632, 32340), (660, 30968), (672, 30415), (735, 27808), (770, 26544), (784, 26070), (790, 25872), (840, 24332), (869, 23520), (880, 23226), (924, 22120), (948, 21560), (980, 20856), (1056, 19355), (1078, 18960), (1106, 18480), (1120, 18249), (1155, 17696), (1176, 17380), (1185, 17248), (1232, 16590), (1264, 16170), (1320, 15484), (1470, 13904), (1540, 13272), (1568, 13035), (1580, 12936), (1617, 12640), (1659, 12320), (1680, 12166), (1738, 11760), (1760, 11613), (1848, 11060), (1896, 10780), (1960, 10428), (2156, 9480), (2212, 9240), (2310, 8848), (2352, 8690), (2370, 8624), (2464, 8295), (2528, 8085), (2607, 7840), (2640, 7742), (2695, 7584), (2765, 7392), (2940, 6952), (3080, 6636), (3160, 6468), (3234, 6320), (3318, 6160), (3360, 6083), (3476, 5880), (3696, 5530), (3792, 5390), (3871, 5280), (3920, 5214), (4312, 4740), (4345, 4704), (4424, 4620)]