21784270

素因数分解:

$2^1\times 5^1\times {\mathrm{557}}^1\times {\mathrm{3911}}^1$

素因数の和:4475

約数の個数: 16

約数和(自身を含む): 39292128

約数和(自身を除く): 17507858

約数列:

[1, 2, 5, 10, 557, 1114, 2785, 3911, 5570, 7822, 19555, 39110, 2178427, 4356854, 10892135, 21784270]

約数ペア:

[(1, 21784270), (2, 10892135), (5, 4356854), (10, 2178427), (557, 39110), (1114, 19555), (2785, 7822), (3911, 5570)]