21060980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9661}}^1$

素因数の和:9779

約数の個数: 24

約数和(自身を含む): 44638440

約数和(自身を除く): 23577460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9661, 19322, 38644, 48305, 96610, 193220, 1053049, 2106098, 4212196, 5265245, 10530490, 21060980]

約数ペア:

[(1, 21060980), (2, 10530490), (4, 5265245), (5, 4212196), (10, 2106098), (20, 1053049), (109, 193220), (218, 96610), (436, 48305), (545, 38644), (1090, 19322), (2180, 9661)]