21104725

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{283}}^1$

素因数の和:469

約数の個数: 24

約数和(自身を含む): 27820640

約数和(自身を除く): 6715915

約数列:

[1, 5, 19, 25, 95, 157, 283, 475, 785, 1415, 2983, 3925, 5377, 7075, 14915, 26885, 44431, 74575, 134425, 222155, 844189, 1110775, 4220945, 21104725]

約数ペア:

[(1, 21104725), (5, 4220945), (19, 1110775), (25, 844189), (95, 222155), (157, 134425), (283, 74575), (475, 44431), (785, 26885), (1415, 14915), (2983, 7075), (3925, 5377)]