20123642890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{167711}}^1$

素因数の和:167815

約数の個数: 48

約数和(自身を含む): 39775919616

約数和(自身を除く): 19652276726

約数列:

[1, 2, 5, 10, 13, 26, 65, 71, 130, 142, 169, 338, 355, 710, 845, 923, 1690, 1846, 4615, 9230, 11999, 23998, 59995, 119990, 167711, 335422, 838555, 1677110, 2180243, 4360486, 10901215, 11907481, 21802430, 23814962, 28343159, 56686318, 59537405, 119074810, 141715795, 154797253, 283431590, 309594506, 773986265, 1547972530, 2012364289, 4024728578, 10061821445, 20123642890]

約数ペア:

[(1, 20123642890), (2, 10061821445), (5, 4024728578), (10, 2012364289), (13, 1547972530), (26, 773986265), (65, 309594506), (71, 283431590), (130, 154797253), (142, 141715795), (169, 119074810), (338, 59537405), (355, 56686318), (710, 28343159), (845, 23814962), (923, 21802430), (1690, 11907481), (1846, 10901215), (4615, 4360486), (9230, 2180243), (11999, 1677110), (23998, 838555), (59995, 335422), (119990, 167711)]