20001905

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{4723}}^1$

素因数の和:4757

約数の個数: 24

約数和(自身を含む): 30158016

約数和(自身を除く): 10156111

約数列:

[1, 5, 7, 11, 35, 55, 77, 121, 385, 605, 847, 4235, 4723, 23615, 33061, 51953, 165305, 259765, 363671, 571483, 1818355, 2857415, 4000381, 20001905]

約数ペア:

[(1, 20001905), (5, 4000381), (7, 2857415), (11, 1818355), (35, 571483), (55, 363671), (77, 259765), (121, 165305), (385, 51953), (605, 33061), (847, 23615), (4235, 4723)]