902388580

素因数分解:

$2^2\times 5^1\times {\mathrm{1999}}^1\times {\mathrm{22571}}^1$

素因数の和:24579

約数の個数: 24

約数和(自身を含む): 1896048000

約数和(自身を除く): 993659420

約数列:

[1, 2, 4, 5, 10, 20, 1999, 3998, 7996, 9995, 19990, 22571, 39980, 45142, 90284, 112855, 225710, 451420, 45119429, 90238858, 180477716, 225597145, 451194290, 902388580]

約数ペア:

[(1, 902388580), (2, 451194290), (4, 225597145), (5, 180477716), (10, 90238858), (20, 45119429), (1999, 451420), (3998, 225710), (7996, 112855), (9995, 90284), (19990, 45142), (22571, 39980)]