21651220

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5981}}^1$

素因数の和:6171

約数の個数: 24

約数和(自身を含む): 45726408

約数和(自身を除く): 24075188

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5981, 11962, 23924, 29905, 59810, 119620, 1082561, 2165122, 4330244, 5412805, 10825610, 21651220]

約数ペア:

[(1, 21651220), (2, 10825610), (4, 5412805), (5, 4330244), (10, 2165122), (20, 1082561), (181, 119620), (362, 59810), (724, 29905), (905, 23924), (1810, 11962), (3620, 5981)]