3940000

素因数分解:

$2^5\times 5^4\times {\mathrm{197}}^1$

素因数の和:227

約数の個数: 60

約数和(自身を含む): 9742194

約数和(自身を除く): 5802194

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 197, 200, 250, 394, 400, 500, 625, 788, 800, 985, 1000, 1250, 1576, 1970, 2000, 2500, 3152, 3940, 4000, 4925, 5000, 6304, 7880, 9850, 10000, 15760, 19700, 20000, 24625, 31520, 39400, 49250, 78800, 98500, 123125, 157600, 197000, 246250, 394000, 492500, 788000, 985000, 1970000, 3940000]

約数ペア:

[(1, 3940000), (2, 1970000), (4, 985000), (5, 788000), (8, 492500), (10, 394000), (16, 246250), (20, 197000), (25, 157600), (32, 123125), (40, 98500), (50, 78800), (80, 49250), (100, 39400), (125, 31520), (160, 24625), (197, 20000), (200, 19700), (250, 15760), (394, 10000), (400, 9850), (500, 7880), (625, 6304), (788, 5000), (800, 4925), (985, 4000), (1000, 3940), (1250, 3152), (1576, 2500), (1970, 2000)]