21615280

素因数分解:

$2^4\times 5^1\times {\mathrm{270191}}^1$

素因数の和:270204

約数の個数: 20

約数和(自身を含む): 50255712

約数和(自身を除く): 28640432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270191, 540382, 1080764, 1350955, 2161528, 2701910, 4323056, 5403820, 10807640, 21615280]

約数ペア:

[(1, 21615280), (2, 10807640), (4, 5403820), (5, 4323056), (8, 2701910), (10, 2161528), (16, 1350955), (20, 1080764), (40, 540382), (80, 270191)]