81257260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{580409}}^1$

素因数の和:580425

約数の個数: 24

約数和(自身を含む): 195017760

約数和(自身を除く): 113760500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 580409, 1160818, 2321636, 2902045, 4062863, 5804090, 8125726, 11608180, 16251452, 20314315, 40628630, 81257260]

約数ペア:

[(1, 81257260), (2, 40628630), (4, 20314315), (5, 16251452), (7, 11608180), (10, 8125726), (14, 5804090), (20, 4062863), (28, 2902045), (35, 2321636), (70, 1160818), (140, 580409)]