20105000

素因数分解:

$2^3\times 5^4\times {\mathrm{4021}}^1$

素因数の和:4047

約数の個数: 40

約数和(自身を含む): 47117730

約数和(自身を除く): 27012730

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4021, 5000, 8042, 16084, 20105, 32168, 40210, 80420, 100525, 160840, 201050, 402100, 502625, 804200, 1005250, 2010500, 2513125, 4021000, 5026250, 10052500, 20105000]

約数ペア:

[(1, 20105000), (2, 10052500), (4, 5026250), (5, 4021000), (8, 2513125), (10, 2010500), (20, 1005250), (25, 804200), (40, 502625), (50, 402100), (100, 201050), (125, 160840), (200, 100525), (250, 80420), (500, 40210), (625, 32168), (1000, 20105), (1250, 16084), (2500, 8042), (4021, 5000)]