2561391

素因数分解:

$3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{373}}^1$

素因数の和:495

約数の個数: 24

約数和(自身を含む): 4278560

約数和(自身を除く): 1717169

約数列:

[1, 3, 7, 9, 21, 63, 109, 327, 373, 763, 981, 1119, 2289, 2611, 3357, 6867, 7833, 23499, 40657, 121971, 284599, 365913, 853797, 2561391]

約数ペア:

[(1, 2561391), (3, 853797), (7, 365913), (9, 284599), (21, 121971), (63, 40657), (109, 23499), (327, 7833), (373, 6867), (763, 3357), (981, 2611), (1119, 2289)]