21780748

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{495017}}^1$

素因数の和:495032

約数の個数: 12

約数和(自身を含む): 41581512

約数和(自身を除く): 19800764

約数列:

[1, 2, 4, 11, 22, 44, 495017, 990034, 1980068, 5445187, 10890374, 21780748]

約数ペア:

[(1, 21780748), (2, 10890374), (4, 5445187), (11, 1980068), (22, 990034), (44, 495017)]