20118428

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{197}}^1\times {\mathrm{211}}^1$

素因数の和:434

約数の個数: 36

約数和(自身を含む): 39079656

約数和(自身を除く): 18961228

約数列:

[1, 2, 4, 11, 22, 44, 121, 197, 211, 242, 394, 422, 484, 788, 844, 2167, 2321, 4334, 4642, 8668, 9284, 23837, 25531, 41567, 47674, 51062, 83134, 95348, 102124, 166268, 457237, 914474, 1828948, 5029607, 10059214, 20118428]

約数ペア:

[(1, 20118428), (2, 10059214), (4, 5029607), (11, 1828948), (22, 914474), (44, 457237), (121, 166268), (197, 102124), (211, 95348), (242, 83134), (394, 51062), (422, 47674), (484, 41567), (788, 25531), (844, 23837), (2167, 9284), (2321, 8668), (4334, 4642)]