81227875

素因数分解:

$5^3\times {\mathrm{157}}^1\times {\mathrm{4139}}^1$

素因数の和:4311

約数の個数: 16

約数和(自身を含む): 102042720

約数和(自身を除く): 20814845

約数列:

[1, 5, 25, 125, 157, 785, 3925, 4139, 19625, 20695, 103475, 517375, 649823, 3249115, 16245575, 81227875]

約数ペア:

[(1, 81227875), (5, 16245575), (25, 3249115), (125, 649823), (157, 517375), (785, 103475), (3925, 20695), (4139, 19625)]