19977620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76837}}^1$

素因数の和:76859

約数の個数: 24

約数和(自身を含む): 45180744

約数和(自身を除く): 25203124

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76837, 153674, 307348, 384185, 768370, 998881, 1536740, 1997762, 3995524, 4994405, 9988810, 19977620]

約数ペア:

[(1, 19977620), (2, 9988810), (4, 4994405), (5, 3995524), (10, 1997762), (13, 1536740), (20, 998881), (26, 768370), (52, 384185), (65, 307348), (130, 153674), (260, 76837)]