21543080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2437}}^1$

素因数の和:2478

約数の個数: 64

約数和(自身を含む): 55293840

約数和(自身を除く): 33750760

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2437, 4420, 4874, 8840, 9748, 12185, 19496, 24370, 31681, 41429, 48740, 63362, 82858, 97480, 126724, 158405, 165716, 207145, 253448, 316810, 331432, 414290, 538577, 633620, 828580, 1077154, 1267240, 1657160, 2154308, 2692885, 4308616, 5385770, 10771540, 21543080]

約数ペア:

[(1, 21543080), (2, 10771540), (4, 5385770), (5, 4308616), (8, 2692885), (10, 2154308), (13, 1657160), (17, 1267240), (20, 1077154), (26, 828580), (34, 633620), (40, 538577), (52, 414290), (65, 331432), (68, 316810), (85, 253448), (104, 207145), (130, 165716), (136, 158405), (170, 126724), (221, 97480), (260, 82858), (340, 63362), (442, 48740), (520, 41429), (680, 31681), (884, 24370), (1105, 19496), (1768, 12185), (2210, 9748), (2437, 8840), (4420, 4874)]