21048305

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1\times {\mathrm{281}}^1$

素因数の和:568

約数の個数: 16

約数和(自身を含む): 25826688

約数和(自身を除く): 4778383

約数列:

[1, 5, 71, 211, 281, 355, 1055, 1405, 14981, 19951, 59291, 74905, 99755, 296455, 4209661, 21048305]

約数ペア:

[(1, 21048305), (5, 4209661), (71, 296455), (211, 99755), (281, 74905), (355, 59291), (1055, 19951), (1405, 14981)]