9995000

素因数分解:

$2^3\times 5^4\times {\mathrm{1999}}^1$

素因数の和:2025

約数の個数: 40

約数和(自身を含む): 23430000

約数和(自身を除く): 13435000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 1999, 2500, 3998, 5000, 7996, 9995, 15992, 19990, 39980, 49975, 79960, 99950, 199900, 249875, 399800, 499750, 999500, 1249375, 1999000, 2498750, 4997500, 9995000]

約数ペア:

[(1, 9995000), (2, 4997500), (4, 2498750), (5, 1999000), (8, 1249375), (10, 999500), (20, 499750), (25, 399800), (40, 249875), (50, 199900), (100, 99950), (125, 79960), (200, 49975), (250, 39980), (500, 19990), (625, 15992), (1000, 9995), (1250, 7996), (1999, 5000), (2500, 3998)]