21259765

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{3793}}^1$

素因数の和:3876

約数の個数: 16

約数和(自身を含む): 27316800

約数和(自身を除く): 6057035

約数列:

[1, 5, 19, 59, 95, 295, 1121, 3793, 5605, 18965, 72067, 223787, 360335, 1118935, 4251953, 21259765]

約数ペア:

[(1, 21259765), (5, 4251953), (19, 1118935), (59, 360335), (95, 223787), (295, 72067), (1121, 18965), (3793, 5605)]