20518655

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1138

約数の個数: 16

約数和(自身を含む): 25498368

約数和(自身を除く): 4979713

約数列:

[1, 5, 41, 101, 205, 505, 991, 4141, 4955, 20705, 40631, 100091, 203155, 500455, 4103731, 20518655]

約数ペア:

[(1, 20518655), (5, 4103731), (41, 500455), (101, 203155), (205, 100091), (505, 40631), (991, 20705), (4141, 4955)]