20015920

素因数分解:

$2^4\times 5^1\times {\mathrm{250199}}^1$

素因数の和:250212

約数の個数: 20

約数和(自身を含む): 46537200

約数和(自身を除く): 26521280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 250199, 500398, 1000796, 1250995, 2001592, 2501990, 4003184, 5003980, 10007960, 20015920]

約数ペア:

[(1, 20015920), (2, 10007960), (4, 5003980), (5, 4003184), (8, 2501990), (10, 2001592), (16, 1250995), (20, 1000796), (40, 500398), (80, 250199)]