20978725

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:357

約数の個数: 24

約数和(自身を含む): 26998272

約数和(自身を除く): 6019547

約数列:

[1, 5, 25, 53, 71, 223, 265, 355, 1115, 1325, 1775, 3763, 5575, 11819, 15833, 18815, 59095, 79165, 94075, 295475, 395825, 839149, 4195745, 20978725]

約数ペア:

[(1, 20978725), (5, 4195745), (25, 839149), (53, 395825), (71, 295475), (223, 94075), (265, 79165), (355, 59095), (1115, 18815), (1325, 15833), (1775, 11819), (3763, 5575)]