21279025

素因数分解:

$5^2\times {\mathrm{23}}^2\times {\mathrm{1609}}^1$

素因数の和:1665

約数の個数: 18

約数和(自身を含む): 27600230

約数和(自身を除く): 6321205

約数列:

[1, 5, 23, 25, 115, 529, 575, 1609, 2645, 8045, 13225, 37007, 40225, 185035, 851161, 925175, 4255805, 21279025]

約数ペア:

[(1, 21279025), (5, 4255805), (23, 925175), (25, 851161), (115, 185035), (529, 40225), (575, 37007), (1609, 13225), (2645, 8045)]