20020040

素因数分解:

$2^3\times 5^1\times {\mathrm{500501}}^1$

素因数の和:500512

約数の個数: 16

約数和(自身を含む): 45045180

約数和(自身を除く): 25025140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 500501, 1001002, 2002004, 2502505, 4004008, 5005010, 10010020, 20020040]

約数ペア:

[(1, 20020040), (2, 10010020), (4, 5005010), (5, 4004008), (8, 2502505), (10, 2002004), (20, 1001002), (40, 500501)]