20515100

素因数分解:

$2^2\times 5^2\times {\mathrm{205151}}^1$

素因数の和:205165

約数の個数: 18

約数和(自身を含む): 44517984

約数和(自身を除く): 24002884

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 205151, 410302, 820604, 1025755, 2051510, 4103020, 5128775, 10257550, 20515100]

約数ペア:

[(1, 20515100), (2, 10257550), (4, 5128775), (5, 4103020), (10, 2051510), (20, 1025755), (25, 820604), (50, 410302), (100, 205151)]