21203116

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{4421}}^1$

素因数の和:4545

約数の個数: 24

約数和(自身を含む): 40859280

約数和(自身を除く): 19656164

約数列:

[1, 2, 4, 11, 22, 44, 109, 218, 436, 1199, 2398, 4421, 4796, 8842, 17684, 48631, 97262, 194524, 481889, 963778, 1927556, 5300779, 10601558, 21203116]

約数ペア:

[(1, 21203116), (2, 10601558), (4, 5300779), (11, 1927556), (22, 963778), (44, 481889), (109, 194524), (218, 97262), (436, 48631), (1199, 17684), (2398, 8842), (4421, 4796)]