20449779

素因数分解:

$3^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{6449}}^1$

素因数の和:6610

約数の個数: 16

約数和(自身を含む): 31372800

約数和(自身を除く): 10923021

約数列:

[1, 3, 7, 21, 151, 453, 1057, 3171, 6449, 19347, 45143, 135429, 973799, 2921397, 6816593, 20449779]

約数ペア:

[(1, 20449779), (3, 6816593), (7, 2921397), (21, 973799), (151, 135429), (453, 45143), (1057, 19347), (3171, 6449)]