20187856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1367}}^1$

素因数の和:1459

約数の個数: 40

約数和(自身を含む): 42747264

約数和(自身を除く): 22559408

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 104, 142, 208, 284, 568, 923, 1136, 1367, 1846, 2734, 3692, 5468, 7384, 10936, 14768, 17771, 21872, 35542, 71084, 97057, 142168, 194114, 284336, 388228, 776456, 1261741, 1552912, 2523482, 5046964, 10093928, 20187856]

約数ペア:

[(1, 20187856), (2, 10093928), (4, 5046964), (8, 2523482), (13, 1552912), (16, 1261741), (26, 776456), (52, 388228), (71, 284336), (104, 194114), (142, 142168), (208, 97057), (284, 71084), (568, 35542), (923, 21872), (1136, 17771), (1367, 14768), (1846, 10936), (2734, 7384), (3692, 5468)]