80818040

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{4049}}^1$

素因数の和:4559

約数の個数: 32

約数和(自身を含む): 182250000

約数和(自身を除く): 101431960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1996, 2495, 3992, 4049, 4990, 8098, 9980, 16196, 19960, 20245, 32392, 40490, 80980, 161960, 2020451, 4040902, 8081804, 10102255, 16163608, 20204510, 40409020, 80818040]

約数ペア:

[(1, 80818040), (2, 40409020), (4, 20204510), (5, 16163608), (8, 10102255), (10, 8081804), (20, 4040902), (40, 2020451), (499, 161960), (998, 80980), (1996, 40490), (2495, 32392), (3992, 20245), (4049, 19960), (4990, 16196), (8098, 9980)]