21425000

素因数分解:

$2^3\times 5^5\times {\mathrm{857}}^1$

素因数の和:888

約数の個数: 48

約数和(自身を含む): 50270220

約数和(自身を除く): 28845220

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 857, 1000, 1250, 1714, 2500, 3125, 3428, 4285, 5000, 6250, 6856, 8570, 12500, 17140, 21425, 25000, 34280, 42850, 85700, 107125, 171400, 214250, 428500, 535625, 857000, 1071250, 2142500, 2678125, 4285000, 5356250, 10712500, 21425000]

約数ペア:

[(1, 21425000), (2, 10712500), (4, 5356250), (5, 4285000), (8, 2678125), (10, 2142500), (20, 1071250), (25, 857000), (40, 535625), (50, 428500), (100, 214250), (125, 171400), (200, 107125), (250, 85700), (500, 42850), (625, 34280), (857, 25000), (1000, 21425), (1250, 17140), (1714, 12500), (2500, 8570), (3125, 6856), (3428, 6250), (4285, 5000)]