4005625

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1$

素因数の和:79

約数の個数: 40

約数和(自身を含む): 5904360

約数和(自身を除く): 1898735

約数列:

[1, 5, 13, 17, 25, 29, 65, 85, 125, 145, 221, 325, 377, 425, 493, 625, 725, 1105, 1625, 1885, 2125, 2465, 3625, 5525, 6409, 8125, 9425, 10625, 12325, 18125, 27625, 32045, 47125, 61625, 138125, 160225, 235625, 308125, 801125, 4005625]

約数ペア:

[(1, 4005625), (5, 801125), (13, 308125), (17, 235625), (25, 160225), (29, 138125), (65, 61625), (85, 47125), (125, 32045), (145, 27625), (221, 18125), (325, 12325), (377, 10625), (425, 9425), (493, 8125), (625, 6409), (725, 5525), (1105, 3625), (1625, 2465), (1885, 2125)]