21820225

素因数分解:

$5^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{1861}}^1$

素因数の和:1945

約数の個数: 24

約数和(自身を含む): 31400768

約数和(自身を除く): 9580543

約数列:

[1, 5, 7, 25, 35, 67, 175, 335, 469, 1675, 1861, 2345, 9305, 11725, 13027, 46525, 65135, 124687, 325675, 623435, 872809, 3117175, 4364045, 21820225]

約数ペア:

[(1, 21820225), (5, 4364045), (7, 3117175), (25, 872809), (35, 623435), (67, 325675), (175, 124687), (335, 65135), (469, 46525), (1675, 13027), (1861, 11725), (2345, 9305)]