19912625

素因数分解:

$5^3\times {\mathrm{241}}^1\times {\mathrm{661}}^1$

素因数の和:917

約数の個数: 16

約数和(自身を含む): 24991824

約数和(自身を除く): 5079199

約数列:

[1, 5, 25, 125, 241, 661, 1205, 3305, 6025, 16525, 30125, 82625, 159301, 796505, 3982525, 19912625]

約数ペア:

[(1, 19912625), (5, 3982525), (25, 796505), (125, 159301), (241, 82625), (661, 30125), (1205, 16525), (3305, 6025)]