20178202

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{199}}^1\times {\mathrm{419}}^1$

素因数の和:642

約数の個数: 24

約数和(自身を含む): 33516000

約数和(自身を除く): 13337798

約数列:

[1, 2, 11, 22, 121, 199, 242, 398, 419, 838, 2189, 4378, 4609, 9218, 24079, 48158, 50699, 83381, 101398, 166762, 917191, 1834382, 10089101, 20178202]

約数ペア:

[(1, 20178202), (2, 10089101), (11, 1834382), (22, 917191), (121, 166762), (199, 101398), (242, 83381), (398, 50699), (419, 48158), (838, 24079), (2189, 9218), (4378, 4609)]