21191875

素因数分解:

$5^4\times {\mathrm{41}}^1\times {\mathrm{827}}^1$

素因数の和:888

約数の個数: 20

約数和(自身を含む): 27160056

約数和(自身を除く): 5968181

約数列:

[1, 5, 25, 41, 125, 205, 625, 827, 1025, 4135, 5125, 20675, 25625, 33907, 103375, 169535, 516875, 847675, 4238375, 21191875]

約数ペア:

[(1, 21191875), (5, 4238375), (25, 847675), (41, 516875), (125, 169535), (205, 103375), (625, 33907), (827, 25625), (1025, 20675), (4135, 5125)]