78879280

素因数分解:

$2^4\times 5^1\times {\mathrm{985991}}^1$

素因数の和:986004

約数の個数: 20

約数和(自身を含む): 183394512

約数和(自身を除く): 104515232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 985991, 1971982, 3943964, 4929955, 7887928, 9859910, 15775856, 19719820, 39439640, 78879280]

約数ペア:

[(1, 78879280), (2, 39439640), (4, 19719820), (5, 15775856), (8, 9859910), (10, 7887928), (16, 4929955), (20, 3943964), (40, 1971982), (80, 985991)]