19999000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{2857}}^1$

素因数の和:2885

約数の個数: 64

約数和(自身を含む): 53501760

約数和(自身を除く): 33502760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 700, 875, 1000, 1400, 1750, 2857, 3500, 5714, 7000, 11428, 14285, 19999, 22856, 28570, 39998, 57140, 71425, 79996, 99995, 114280, 142850, 159992, 199990, 285700, 357125, 399980, 499975, 571400, 714250, 799960, 999950, 1428500, 1999900, 2499875, 2857000, 3999800, 4999750, 9999500, 19999000]

約数ペア:

[(1, 19999000), (2, 9999500), (4, 4999750), (5, 3999800), (7, 2857000), (8, 2499875), (10, 1999900), (14, 1428500), (20, 999950), (25, 799960), (28, 714250), (35, 571400), (40, 499975), (50, 399980), (56, 357125), (70, 285700), (100, 199990), (125, 159992), (140, 142850), (175, 114280), (200, 99995), (250, 79996), (280, 71425), (350, 57140), (500, 39998), (700, 28570), (875, 22856), (1000, 19999), (1400, 14285), (1750, 11428), (2857, 7000), (3500, 5714)]