20258495

素因数分解:

$5^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 24776928

約数和(自身を除く): 4518433

約数列:

[1, 5, 131, 157, 197, 655, 785, 985, 20567, 25807, 30929, 102835, 129035, 154645, 4051699, 20258495]

約数ペア:

[(1, 20258495), (5, 4051699), (131, 154645), (157, 129035), (197, 102835), (655, 30929), (785, 25807), (985, 20567)]