201800780

素因数分解:

$2^2\times 5^1\times {\mathrm{1609}}^1\times {\mathrm{6271}}^1$

素因数の和:7889

約数の個数: 24

約数和(自身を含む): 424112640

約数和(自身を除く): 222311860

約数列:

[1, 2, 4, 5, 10, 20, 1609, 3218, 6271, 6436, 8045, 12542, 16090, 25084, 31355, 32180, 62710, 125420, 10090039, 20180078, 40360156, 50450195, 100900390, 201800780]

約数ペア:

[(1, 201800780), (2, 100900390), (4, 50450195), (5, 40360156), (10, 20180078), (20, 10090039), (1609, 125420), (3218, 62710), (6271, 32180), (6436, 31355), (8045, 25084), (12542, 16090)]