19994524

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{379}}^1$

素因数の和:514

約数の個数: 36

約数和(自身を含む): 38915800

約数和(自身を除く): 18921276

約数列:

[1, 2, 4, 11, 22, 44, 109, 121, 218, 242, 379, 436, 484, 758, 1199, 1516, 2398, 4169, 4796, 8338, 13189, 16676, 26378, 41311, 45859, 52756, 82622, 91718, 165244, 183436, 454421, 908842, 1817684, 4998631, 9997262, 19994524]

約数ペア:

[(1, 19994524), (2, 9997262), (4, 4998631), (11, 1817684), (22, 908842), (44, 454421), (109, 183436), (121, 165244), (218, 91718), (242, 82622), (379, 52756), (436, 45859), (484, 41311), (758, 26378), (1199, 16676), (1516, 13189), (2398, 8338), (4169, 4796)]