21649645

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{811}}^1$

素因数の和:1116

約数の個数: 16

約数和(自身を含む): 27478080

約数和(自身を除く): 5828435

約数列:

[1, 5, 19, 95, 281, 811, 1405, 4055, 5339, 15409, 26695, 77045, 227891, 1139455, 4329929, 21649645]

約数ペア:

[(1, 21649645), (5, 4329929), (19, 1139455), (95, 227891), (281, 77045), (811, 26695), (1405, 15409), (4055, 5339)]