79280

素因数分解:

$2^4\times 5^1\times {\mathrm{991}}^1$

素因数の和:1004

約数の個数: 20

約数和(自身を含む): 184512

約数和(自身を除く): 105232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 991, 1982, 3964, 4955, 7928, 9910, 15856, 19820, 39640, 79280]

約数ペア:

[(1, 79280), (2, 39640), (4, 19820), (5, 15856), (8, 9910), (10, 7928), (16, 4955), (20, 3964), (40, 1982), (80, 991)]