20815728040

素因数分解:

$2^3\times 5^1\times {\mathrm{520393201}}^1$

素因数の和:520393212

約数の個数: 16

約数和(自身を含む): 46835388180

約数和(自身を除く): 26019660140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520393201, 1040786402, 2081572804, 2601966005, 4163145608, 5203932010, 10407864020, 20815728040]

約数ペア:

[(1, 20815728040), (2, 10407864020), (4, 5203932010), (5, 4163145608), (8, 2601966005), (10, 2081572804), (20, 1040786402), (40, 520393201)]