21750025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{569}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 29685600

約数和(自身を除く): 7935575

約数列:

[1, 5, 11, 25, 55, 139, 275, 569, 695, 1529, 2845, 3475, 6259, 7645, 14225, 31295, 38225, 79091, 156475, 395455, 870001, 1977275, 4350005, 21750025]

約数ペア:

[(1, 21750025), (5, 4350005), (11, 1977275), (25, 870001), (55, 395455), (139, 156475), (275, 79091), (569, 38225), (695, 31295), (1529, 14225), (2845, 7645), (3475, 6259)]