21000369675

素因数分解:

$3^1\times 5^2\times {\mathrm{280004929}}^1$

素因数の和:280004942

約数の個数: 12

約数和(自身を含む): 34720611320

約数和(自身を除く): 13720241645

約数列:

[1, 3, 5, 15, 25, 75, 280004929, 840014787, 1400024645, 4200073935, 7000123225, 21000369675]

約数ペア:

[(1, 21000369675), (3, 7000123225), (5, 4200073935), (15, 1400024645), (25, 840014787), (75, 280004929)]