21781906

素因数分解:

$2^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{2437}}^1$

素因数の和:2589

約数の個数: 16

約数和(自身を含む): 33790680

約数和(自身を除く): 12008774

約数列:

[1, 2, 41, 82, 109, 218, 2437, 4469, 4874, 8938, 99917, 199834, 265633, 531266, 10890953, 21781906]

約数ペア:

[(1, 21781906), (2, 10890953), (41, 531266), (82, 265633), (109, 199834), (218, 99917), (2437, 8938), (4469, 4874)]