80007920

素因数分解:

$2^4\times 5^1\times {\mathrm{1000099}}^1$

素因数の和:1000112

約数の個数: 20

約数和(自身を含む): 186018600

約数和(自身を除く): 106010680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1000099, 2000198, 4000396, 5000495, 8000792, 10000990, 16001584, 20001980, 40003960, 80007920]

約数ペア:

[(1, 80007920), (2, 40003960), (4, 20001980), (5, 16001584), (8, 10000990), (10, 8000792), (16, 5000495), (20, 4000396), (40, 2000198), (80, 1000099)]