20980538

素因数分解:

$2^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1\times {\mathrm{613}}^1$

素因数の和:881

約数の個数: 16

約数和(自身を含む): 32013960

約数和(自身を除く): 11033422

約数列:

[1, 2, 109, 157, 218, 314, 613, 1226, 17113, 34226, 66817, 96241, 133634, 192482, 10490269, 20980538]

約数ペア:

[(1, 20980538), (2, 10490269), (109, 192482), (157, 133634), (218, 96241), (314, 66817), (613, 34226), (1226, 17113)]