81551920

素因数分解:

$2^4\times 5^1\times {\mathrm{1019399}}^1$

素因数の和:1019412

約数の個数: 20

約数和(自身を含む): 189608400

約数和(自身を除く): 108056480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019399, 2038798, 4077596, 5096995, 8155192, 10193990, 16310384, 20387980, 40775960, 81551920]

約数ペア:

[(1, 81551920), (2, 40775960), (4, 20387980), (5, 16310384), (8, 10193990), (10, 8155192), (16, 5096995), (20, 4077596), (40, 2038798), (80, 1019399)]