21260619

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{401}}^1$

素因数の和:587

約数の個数: 24

約数和(自身を含む): 31732272

約数和(自身を除く): 10471653

約数列:

[1, 3, 9, 43, 129, 137, 387, 401, 411, 1203, 1233, 3609, 5891, 17243, 17673, 51729, 53019, 54937, 155187, 164811, 494433, 2362291, 7086873, 21260619]

約数ペア:

[(1, 21260619), (3, 7086873), (9, 2362291), (43, 494433), (129, 164811), (137, 155187), (387, 54937), (401, 53019), (411, 51729), (1203, 17673), (1233, 17243), (3609, 5891)]