21152456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:318

約数の個数: 64

約数和(自身を含む): 45964800

約数和(自身を除く): 24812344

約数列:

[1, 2, 4, 8, 13, 23, 26, 37, 46, 52, 74, 92, 104, 148, 184, 239, 296, 299, 478, 481, 598, 851, 956, 962, 1196, 1702, 1912, 1924, 2392, 3107, 3404, 3848, 5497, 6214, 6808, 8843, 10994, 11063, 12428, 17686, 21988, 22126, 24856, 35372, 43976, 44252, 70744, 71461, 88504, 114959, 142922, 203389, 229918, 285844, 406778, 459836, 571688, 813556, 919672, 1627112, 2644057, 5288114, 10576228, 21152456]

約数ペア:

[(1, 21152456), (2, 10576228), (4, 5288114), (8, 2644057), (13, 1627112), (23, 919672), (26, 813556), (37, 571688), (46, 459836), (52, 406778), (74, 285844), (92, 229918), (104, 203389), (148, 142922), (184, 114959), (239, 88504), (296, 71461), (299, 70744), (478, 44252), (481, 43976), (598, 35372), (851, 24856), (956, 22126), (962, 21988), (1196, 17686), (1702, 12428), (1912, 11063), (1924, 10994), (2392, 8843), (3107, 6808), (3404, 6214), (3848, 5497)]