20212180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^2$

素因数の和:364

約数の個数: 36

約数和(自身を含む): 43759548

約数和(自身を除く): 23547368

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 157, 164, 205, 314, 410, 628, 785, 820, 1570, 3140, 6437, 12874, 24649, 25748, 32185, 49298, 64370, 98596, 123245, 128740, 246490, 492980, 1010609, 2021218, 4042436, 5053045, 10106090, 20212180]

約数ペア:

[(1, 20212180), (2, 10106090), (4, 5053045), (5, 4042436), (10, 2021218), (20, 1010609), (41, 492980), (82, 246490), (157, 128740), (164, 123245), (205, 98596), (314, 64370), (410, 49298), (628, 32185), (785, 25748), (820, 24649), (1570, 12874), (3140, 6437)]