20997825

素因数分解:

$3^1\times 5^2\times {\mathrm{149}}^1\times {\mathrm{1879}}^1$

素因数の和:2041

約数の個数: 24

約数和(自身を含む): 34968000

約数和(自身を除く): 13970175

約数列:

[1, 3, 5, 15, 25, 75, 149, 447, 745, 1879, 2235, 3725, 5637, 9395, 11175, 28185, 46975, 140925, 279971, 839913, 1399855, 4199565, 6999275, 20997825]

約数ペア:

[(1, 20997825), (3, 6999275), (5, 4199565), (15, 1399855), (25, 839913), (75, 279971), (149, 140925), (447, 46975), (745, 28185), (1879, 11175), (2235, 9395), (3725, 5637)]