20512890875

素因数分解:

$5^3\times {\mathrm{509}}^1\times {\mathrm{322403}}^1$

素因数の和:322927

約数の個数: 16

約数和(自身を含む): 25650462240

約数和(自身を除く): 5137571365

約数列:

[1, 5, 25, 125, 509, 2545, 12725, 63625, 322403, 1612015, 8060075, 40300375, 164103127, 820515635, 4102578175, 20512890875]

約数ペア:

[(1, 20512890875), (5, 4102578175), (25, 820515635), (125, 164103127), (509, 40300375), (2545, 8060075), (12725, 1612015), (63625, 322403)]