505000

素因数分解:

$2^3\times 5^4\times {\mathrm{101}}^1$

素因数の和:127

約数の個数: 40

約数和(自身を含む): 1194930

約数和(自身を除く): 689930

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 125, 200, 202, 250, 404, 500, 505, 625, 808, 1000, 1010, 1250, 2020, 2500, 2525, 4040, 5000, 5050, 10100, 12625, 20200, 25250, 50500, 63125, 101000, 126250, 252500, 505000]

約数ペア:

[(1, 505000), (2, 252500), (4, 126250), (5, 101000), (8, 63125), (10, 50500), (20, 25250), (25, 20200), (40, 12625), (50, 10100), (100, 5050), (101, 5000), (125, 4040), (200, 2525), (202, 2500), (250, 2020), (404, 1250), (500, 1010), (505, 1000), (625, 808)]