21087745

素因数分解:

$5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{2129}}^1$

素因数の和:2424

約数の個数: 16

約数和(自身を含む): 29036160

約数和(自身を除く): 7948415

約数列:

[1, 5, 7, 35, 283, 1415, 1981, 2129, 9905, 10645, 14903, 74515, 602507, 3012535, 4217549, 21087745]

約数ペア:

[(1, 21087745), (5, 4217549), (7, 3012535), (35, 602507), (283, 74515), (1415, 14903), (1981, 10645), (2129, 9905)]