7999120

素因数分解:

$2^4\times 5^1\times {\mathrm{99989}}^1$

素因数の和:100002

約数の個数: 20

約数和(自身を含む): 18598140

約数和(自身を除く): 10599020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 99989, 199978, 399956, 499945, 799912, 999890, 1599824, 1999780, 3999560, 7999120]

約数ペア:

[(1, 7999120), (2, 3999560), (4, 1999780), (5, 1599824), (8, 999890), (10, 799912), (16, 499945), (20, 399956), (40, 199978), (80, 99989)]