21121580

素因数分解:

$2^2\times 5^1\times {\mathrm{827}}^1\times {\mathrm{1277}}^1$

素因数の和:2113

約数の個数: 24

約数和(自身を含む): 44443728

約数和(自身を除く): 23322148

約数列:

[1, 2, 4, 5, 10, 20, 827, 1277, 1654, 2554, 3308, 4135, 5108, 6385, 8270, 12770, 16540, 25540, 1056079, 2112158, 4224316, 5280395, 10560790, 21121580]

約数ペア:

[(1, 21121580), (2, 10560790), (4, 5280395), (5, 4224316), (10, 2112158), (20, 1056079), (827, 25540), (1277, 16540), (1654, 12770), (2554, 8270), (3308, 6385), (4135, 5108)]