21981212

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{4421}}^1$

素因数の和:4549

約数の個数: 24

約数和(自身を含む): 42345072

約数和(自身を除く): 20363860

約数列:

[1, 2, 4, 11, 22, 44, 113, 226, 452, 1243, 2486, 4421, 4972, 8842, 17684, 48631, 97262, 194524, 499573, 999146, 1998292, 5495303, 10990606, 21981212]

約数ペア:

[(1, 21981212), (2, 10990606), (4, 5495303), (11, 1998292), (22, 999146), (44, 499573), (113, 194524), (226, 97262), (452, 48631), (1243, 17684), (2486, 8842), (4421, 4972)]