20280860

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{479}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 44755200

約数和(自身を除く): 24474340

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 73, 116, 145, 146, 290, 292, 365, 479, 580, 730, 958, 1460, 1916, 2117, 2395, 4234, 4790, 8468, 9580, 10585, 13891, 21170, 27782, 34967, 42340, 55564, 69455, 69934, 138910, 139868, 174835, 277820, 349670, 699340, 1014043, 2028086, 4056172, 5070215, 10140430, 20280860]

約数ペア:

[(1, 20280860), (2, 10140430), (4, 5070215), (5, 4056172), (10, 2028086), (20, 1014043), (29, 699340), (58, 349670), (73, 277820), (116, 174835), (145, 139868), (146, 138910), (290, 69934), (292, 69455), (365, 55564), (479, 42340), (580, 34967), (730, 27782), (958, 21170), (1460, 13891), (1916, 10585), (2117, 9580), (2395, 8468), (4234, 4790)]