65521640

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{23071}}^1$

素因数の和:23153

約数の個数: 32

約数和(自身を含む): 149506560

約数和(自身を除く): 83984920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 23071, 46142, 92284, 115355, 184568, 230710, 461420, 922840, 1638041, 3276082, 6552164, 8190205, 13104328, 16380410, 32760820, 65521640]

約数ペア:

[(1, 65521640), (2, 32760820), (4, 16380410), (5, 13104328), (8, 8190205), (10, 6552164), (20, 3276082), (40, 1638041), (71, 922840), (142, 461420), (284, 230710), (355, 184568), (568, 115355), (710, 92284), (1420, 46142), (2840, 23071)]