20280080

素因数分解:

$2^4\times 5^1\times {\mathrm{253501}}^1$

素因数の和:253514

約数の個数: 20

約数和(自身を含む): 47151372

約数和(自身を除く): 26871292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253501, 507002, 1014004, 1267505, 2028008, 2535010, 4056016, 5070020, 10140040, 20280080]

約数ペア:

[(1, 20280080), (2, 10140040), (4, 5070020), (5, 4056016), (8, 2535010), (10, 2028008), (16, 1267505), (20, 1014004), (40, 507002), (80, 253501)]