7880000

素因数分解:

$2^6\times 5^4\times {\mathrm{197}}^1$

素因数の和:229

約数の個数: 70

約数和(自身を含む): 19639026

約数和(自身を除く): 11759026

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 197, 200, 250, 320, 394, 400, 500, 625, 788, 800, 985, 1000, 1250, 1576, 1600, 1970, 2000, 2500, 3152, 3940, 4000, 4925, 5000, 6304, 7880, 8000, 9850, 10000, 12608, 15760, 19700, 20000, 24625, 31520, 39400, 40000, 49250, 63040, 78800, 98500, 123125, 157600, 197000, 246250, 315200, 394000, 492500, 788000, 985000, 1576000, 1970000, 3940000, 7880000]

約数ペア:

[(1, 7880000), (2, 3940000), (4, 1970000), (5, 1576000), (8, 985000), (10, 788000), (16, 492500), (20, 394000), (25, 315200), (32, 246250), (40, 197000), (50, 157600), (64, 123125), (80, 98500), (100, 78800), (125, 63040), (160, 49250), (197, 40000), (200, 39400), (250, 31520), (320, 24625), (394, 20000), (400, 19700), (500, 15760), (625, 12608), (788, 10000), (800, 9850), (985, 8000), (1000, 7880), (1250, 6304), (1576, 5000), (1600, 4925), (1970, 4000), (2000, 3940), (2500, 3152)]