21497480

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6803}}^1$

素因数の和:6893

約数の個数: 32

約数和(自身を含む): 48988800

約数和(自身を除く): 27491320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6803, 13606, 27212, 34015, 54424, 68030, 136060, 272120, 537437, 1074874, 2149748, 2687185, 4299496, 5374370, 10748740, 21497480]

約数ペア:

[(1, 21497480), (2, 10748740), (4, 5374370), (5, 4299496), (8, 2687185), (10, 2149748), (20, 1074874), (40, 537437), (79, 272120), (158, 136060), (316, 68030), (395, 54424), (632, 34015), (790, 27212), (1580, 13606), (3160, 6803)]