19980820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14071}}^1$

素因数の和:14151

約数の個数: 24

約数和(自身を含む): 42553728

約数和(自身を除く): 22572908

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14071, 28142, 56284, 70355, 140710, 281420, 999041, 1998082, 3996164, 4995205, 9990410, 19980820]

約数ペア:

[(1, 19980820), (2, 9990410), (4, 4995205), (5, 3996164), (10, 1998082), (20, 999041), (71, 281420), (142, 140710), (284, 70355), (355, 56284), (710, 28142), (1420, 14071)]