20858240

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1$

素因数の和:164

約数の個数: 128

約数和(自身を含む): 56548800

約数和(自身を除く): 35690560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 64, 65, 80, 92, 104, 109, 115, 128, 130, 160, 184, 208, 218, 230, 260, 299, 320, 368, 416, 436, 460, 520, 545, 598, 640, 736, 832, 872, 920, 1040, 1090, 1196, 1417, 1472, 1495, 1664, 1744, 1840, 2080, 2180, 2392, 2507, 2834, 2944, 2990, 3488, 3680, 4160, 4360, 4784, 5014, 5668, 5980, 6976, 7085, 7360, 8320, 8720, 9568, 10028, 11336, 11960, 12535, 13952, 14170, 14720, 17440, 19136, 20056, 22672, 23920, 25070, 28340, 32591, 34880, 38272, 40112, 45344, 47840, 50140, 56680, 65182, 69760, 80224, 90688, 95680, 100280, 113360, 130364, 160448, 162955, 181376, 191360, 200560, 226720, 260728, 320896, 325910, 401120, 453440, 521456, 651820, 802240, 906880, 1042912, 1303640, 1604480, 2085824, 2607280, 4171648, 5214560, 10429120, 20858240]

約数ペア:

[(1, 20858240), (2, 10429120), (4, 5214560), (5, 4171648), (8, 2607280), (10, 2085824), (13, 1604480), (16, 1303640), (20, 1042912), (23, 906880), (26, 802240), (32, 651820), (40, 521456), (46, 453440), (52, 401120), (64, 325910), (65, 320896), (80, 260728), (92, 226720), (104, 200560), (109, 191360), (115, 181376), (128, 162955), (130, 160448), (160, 130364), (184, 113360), (208, 100280), (218, 95680), (230, 90688), (260, 80224), (299, 69760), (320, 65182), (368, 56680), (416, 50140), (436, 47840), (460, 45344), (520, 40112), (545, 38272), (598, 34880), (640, 32591), (736, 28340), (832, 25070), (872, 23920), (920, 22672), (1040, 20056), (1090, 19136), (1196, 17440), (1417, 14720), (1472, 14170), (1495, 13952), (1664, 12535), (1744, 11960), (1840, 11336), (2080, 10028), (2180, 9568), (2392, 8720), (2507, 8320), (2834, 7360), (2944, 7085), (2990, 6976), (3488, 5980), (3680, 5668), (4160, 5014), (4360, 4784)]