128251640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{291481}}^1$

素因数の和:291503

約数の個数: 32

約数和(自身を含む): 314800560

約数和(自身を除く): 186548920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 291481, 582962, 1165924, 1457405, 2331848, 2914810, 3206291, 5829620, 6412582, 11659240, 12825164, 16031455, 25650328, 32062910, 64125820, 128251640]

約数ペア:

[(1, 128251640), (2, 64125820), (4, 32062910), (5, 25650328), (8, 16031455), (10, 12825164), (11, 11659240), (20, 6412582), (22, 5829620), (40, 3206291), (44, 2914810), (55, 2331848), (88, 1457405), (110, 1165924), (220, 582962), (440, 291481)]