21005228

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{2777}}^1$

素因数の和:2873

約数の個数: 24

約数和(自身を含む): 38580864

約数和(自身を除く): 17575636

約数列:

[1, 2, 4, 31, 61, 62, 122, 124, 244, 1891, 2777, 3782, 5554, 7564, 11108, 86087, 169397, 172174, 338794, 344348, 677588, 5251307, 10502614, 21005228]

約数ペア:

[(1, 21005228), (2, 10502614), (4, 5251307), (31, 677588), (61, 344348), (62, 338794), (122, 172174), (124, 169397), (244, 86087), (1891, 11108), (2777, 7564), (3782, 5554)]