12820880

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3727}}^1$

素因数の和:3783

約数の個数: 40

約数和(自身を含む): 30509952

約数和(自身を除く): 17689072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 3727, 7454, 14908, 18635, 29816, 37270, 59632, 74540, 149080, 160261, 298160, 320522, 641044, 801305, 1282088, 1602610, 2564176, 3205220, 6410440, 12820880]

約数ペア:

[(1, 12820880), (2, 6410440), (4, 3205220), (5, 2564176), (8, 1602610), (10, 1282088), (16, 801305), (20, 641044), (40, 320522), (43, 298160), (80, 160261), (86, 149080), (172, 74540), (215, 59632), (344, 37270), (430, 29816), (688, 18635), (860, 14908), (1720, 7454), (3440, 3727)]