21357200

素因数分解:

$2^4\times 5^2\times {\mathrm{107}}^1\times {\mathrm{499}}^1$

素因数の和:624

約数の個数: 60

約数和(自身を含む): 51894000

約数和(自身を除く): 30536800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 107, 200, 214, 400, 428, 499, 535, 856, 998, 1070, 1712, 1996, 2140, 2495, 2675, 3992, 4280, 4990, 5350, 7984, 8560, 9980, 10700, 12475, 19960, 21400, 24950, 39920, 42800, 49900, 53393, 99800, 106786, 199600, 213572, 266965, 427144, 533930, 854288, 1067860, 1334825, 2135720, 2669650, 4271440, 5339300, 10678600, 21357200]

約数ペア:

[(1, 21357200), (2, 10678600), (4, 5339300), (5, 4271440), (8, 2669650), (10, 2135720), (16, 1334825), (20, 1067860), (25, 854288), (40, 533930), (50, 427144), (80, 266965), (100, 213572), (107, 199600), (200, 106786), (214, 99800), (400, 53393), (428, 49900), (499, 42800), (535, 39920), (856, 24950), (998, 21400), (1070, 19960), (1712, 12475), (1996, 10700), (2140, 9980), (2495, 8560), (2675, 7984), (3992, 5350), (4280, 4990)]