20939786

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{78721}}^1$

素因数の和:78749

約数の個数: 16

約数和(自身を含む): 37786560

約数和(自身を除く): 16846774

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 78721, 157442, 551047, 1102094, 1495699, 2991398, 10469893, 20939786]

約数ペア:

[(1, 20939786), (2, 10469893), (7, 2991398), (14, 1495699), (19, 1102094), (38, 551047), (133, 157442), (266, 78721)]