21015125

素因数分解:

$5^3\times {\mathrm{89}}^1\times {\mathrm{1889}}^1$

素因数の和:1993

約数の個数: 16

約数和(自身を含む): 26535600

約数和(自身を除く): 5520475

約数列:

[1, 5, 25, 89, 125, 445, 1889, 2225, 9445, 11125, 47225, 168121, 236125, 840605, 4203025, 21015125]

約数ペア:

[(1, 21015125), (5, 4203025), (25, 840605), (89, 236125), (125, 168121), (445, 47225), (1889, 11125), (2225, 9445)]