21201404

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12413}}^1$

素因数の和:12485

約数の個数: 24

約数和(自身を含む): 43101408

約数和(自身を除く): 21900004

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12413, 24826, 49652, 86891, 173782, 347564, 757193, 1514386, 3028772, 5300351, 10600702, 21201404]

約数ペア:

[(1, 21201404), (2, 10600702), (4, 5300351), (7, 3028772), (14, 1514386), (28, 757193), (61, 347564), (122, 173782), (244, 86891), (427, 49652), (854, 24826), (1708, 12413)]