20963980

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7541}}^1$

素因数の和:7689

約数の個数: 24

約数和(自身を含む): 44346960

約数和(自身を除く): 23382980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7541, 15082, 30164, 37705, 75410, 150820, 1048199, 2096398, 4192796, 5240995, 10481990, 20963980]

約数ペア:

[(1, 20963980), (2, 10481990), (4, 5240995), (5, 4192796), (10, 2096398), (20, 1048199), (139, 150820), (278, 75410), (556, 37705), (695, 30164), (1390, 15082), (2780, 7541)]