20559915

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{9721}}^1$

素因数の和:9779

約数の個数: 24

約数和(自身を含む): 36399168

約数和(自身を除く): 15839253

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 9721, 29163, 48605, 87489, 145815, 437445, 456887, 1370661, 2284435, 4111983, 6853305, 20559915]

約数ペア:

[(1, 20559915), (3, 6853305), (5, 4111983), (9, 2284435), (15, 1370661), (45, 456887), (47, 437445), (141, 145815), (235, 87489), (423, 48605), (705, 29163), (2115, 9721)]