20122255

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{991}}^1$

素因数の和:1158

約数の個数: 16

約数和(自身を含む): 25141248

約数和(自身を除く): 5018993

約数列:

[1, 5, 31, 131, 155, 655, 991, 4061, 4955, 20305, 30721, 129821, 153605, 649105, 4024451, 20122255]

約数ペア:

[(1, 20122255), (5, 4024451), (31, 649105), (131, 153605), (155, 129821), (655, 30721), (991, 20305), (4061, 4955)]