21551225

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{769}}^1$

素因数の和:857

約数の個数: 24

約数和(自身を含む): 28644000

約数和(自身を除く): 7092775

約数列:

[1, 5, 19, 25, 59, 95, 295, 475, 769, 1121, 1475, 3845, 5605, 14611, 19225, 28025, 45371, 73055, 226855, 365275, 862049, 1134275, 4310245, 21551225]

約数ペア:

[(1, 21551225), (5, 4310245), (19, 1134275), (25, 862049), (59, 365275), (95, 226855), (295, 73055), (475, 45371), (769, 28025), (1121, 19225), (1475, 14611), (3845, 5605)]