20828915

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{2551}}^1$

素因数の和:2650

約数の個数: 16

約数和(自身を含む): 26459136

約数和(自身を除く): 5630221

約数列:

[1, 5, 23, 71, 115, 355, 1633, 2551, 8165, 12755, 58673, 181121, 293365, 905605, 4165783, 20828915]

約数ペア:

[(1, 20828915), (5, 4165783), (23, 905605), (71, 293365), (115, 181121), (355, 58673), (1633, 12755), (2551, 8165)]