21205786

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{2749}}^1$

素因数の和:2806

約数の個数: 32

約数和(自身を含む): 39600000

約数和(自身を除く): 18394214

約数列:

[1, 2, 7, 14, 19, 29, 38, 58, 133, 203, 266, 406, 551, 1102, 2749, 3857, 5498, 7714, 19243, 38486, 52231, 79721, 104462, 159442, 365617, 558047, 731234, 1116094, 1514699, 3029398, 10602893, 21205786]

約数ペア:

[(1, 21205786), (2, 10602893), (7, 3029398), (14, 1514699), (19, 1116094), (29, 731234), (38, 558047), (58, 365617), (133, 159442), (203, 104462), (266, 79721), (406, 52231), (551, 38486), (1102, 19243), (2749, 7714), (3857, 5498)]