21309545

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{5471}}^1$

素因数の和:5536

約数の個数: 16

約数和(自身を含む): 27578880

約数和(自身を除く): 6269335

約数列:

[1, 5, 19, 41, 95, 205, 779, 3895, 5471, 27355, 103949, 224311, 519745, 1121555, 4261909, 21309545]

約数ペア:

[(1, 21309545), (5, 4261909), (19, 1121555), (41, 519745), (95, 224311), (205, 103949), (779, 27355), (3895, 5471)]