21641875

素因数分解:

$5^4\times {\mathrm{31}}^1\times {\mathrm{1117}}^1$

素因数の和:1168

約数の個数: 20

約数和(自身を含む): 27941056

約数和(自身を除く): 6299181

約数列:

[1, 5, 25, 31, 125, 155, 625, 775, 1117, 3875, 5585, 19375, 27925, 34627, 139625, 173135, 698125, 865675, 4328375, 21641875]

約数ペア:

[(1, 21641875), (5, 4328375), (25, 865675), (31, 698125), (125, 173135), (155, 139625), (625, 34627), (775, 27925), (1117, 19375), (3875, 5585)]