20950000

素因数分解:

$2^4\times 5^5\times {\mathrm{419}}^1$

素因数の和:452

約数の個数: 60

約数和(自身を含む): 50856120

約数和(自身を除く): 29906120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 419, 500, 625, 838, 1000, 1250, 1676, 2000, 2095, 2500, 3125, 3352, 4190, 5000, 6250, 6704, 8380, 10000, 10475, 12500, 16760, 20950, 25000, 33520, 41900, 50000, 52375, 83800, 104750, 167600, 209500, 261875, 419000, 523750, 838000, 1047500, 1309375, 2095000, 2618750, 4190000, 5237500, 10475000, 20950000]

約数ペア:

[(1, 20950000), (2, 10475000), (4, 5237500), (5, 4190000), (8, 2618750), (10, 2095000), (16, 1309375), (20, 1047500), (25, 838000), (40, 523750), (50, 419000), (80, 261875), (100, 209500), (125, 167600), (200, 104750), (250, 83800), (400, 52375), (419, 50000), (500, 41900), (625, 33520), (838, 25000), (1000, 20950), (1250, 16760), (1676, 12500), (2000, 10475), (2095, 10000), (2500, 8380), (3125, 6704), (3352, 6250), (4190, 5000)]