20985470

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2687}}^1$

素因数の和:2776

約数の個数: 32

約数和(自身を含む): 41803776

約数和(自身を除く): 20818306

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2687, 3905, 5374, 7810, 13435, 26870, 29557, 59114, 147785, 190777, 295570, 381554, 953885, 1907770, 2098547, 4197094, 10492735, 20985470]

約数ペア:

[(1, 20985470), (2, 10492735), (5, 4197094), (10, 2098547), (11, 1907770), (22, 953885), (55, 381554), (71, 295570), (110, 190777), (142, 147785), (355, 59114), (710, 29557), (781, 26870), (1562, 13435), (2687, 7810), (3905, 5374)]