20512894580

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{245899}}^1$

素因数の和:246048

約数の個数: 48

約数和(自身を含む): 44533473600

約数和(自身を除く): 24020579020

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 97, 172, 194, 215, 388, 430, 485, 860, 970, 1940, 4171, 8342, 16684, 20855, 41710, 83420, 245899, 491798, 983596, 1229495, 2458990, 4917980, 10573657, 21147314, 23852203, 42294628, 47704406, 52868285, 95408812, 105736570, 119261015, 211473140, 238522030, 477044060, 1025644729, 2051289458, 4102578916, 5128223645, 10256447290, 20512894580]

約数ペア:

[(1, 20512894580), (2, 10256447290), (4, 5128223645), (5, 4102578916), (10, 2051289458), (20, 1025644729), (43, 477044060), (86, 238522030), (97, 211473140), (172, 119261015), (194, 105736570), (215, 95408812), (388, 52868285), (430, 47704406), (485, 42294628), (860, 23852203), (970, 21147314), (1940, 10573657), (4171, 4917980), (8342, 2458990), (16684, 1229495), (20855, 983596), (41710, 491798), (83420, 245899)]