21049816

素因数分解:

$2^3\times {\mathrm{499}}^1\times {\mathrm{5273}}^1$

素因数の和:5778

約数の個数: 16

約数和(自身を含む): 39555000

約数和(自身を除く): 18505184

約数列:

[1, 2, 4, 8, 499, 998, 1996, 3992, 5273, 10546, 21092, 42184, 2631227, 5262454, 10524908, 21049816]

約数ペア:

[(1, 21049816), (2, 10524908), (4, 5262454), (8, 2631227), (499, 42184), (998, 21092), (1996, 10546), (3992, 5273)]