21081790

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51419}}^1$

素因数の和:51467

約数の個数: 16

約数和(自身を含む): 38873520

約数和(自身を除く): 17791730

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51419, 102838, 257095, 514190, 2108179, 4216358, 10540895, 21081790]

約数ペア:

[(1, 21081790), (2, 10540895), (5, 4216358), (10, 2108179), (41, 514190), (82, 257095), (205, 102838), (410, 51419)]