16720720

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{4447}}^1$

素因数の和:4507

約数の個数: 40

約数和(自身を含む): 39711744

約数和(自身を除く): 22991024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 4447, 8894, 17788, 22235, 35576, 44470, 71152, 88940, 177880, 209009, 355760, 418018, 836036, 1045045, 1672072, 2090090, 3344144, 4180180, 8360360, 16720720]

約数ペア:

[(1, 16720720), (2, 8360360), (4, 4180180), (5, 3344144), (8, 2090090), (10, 1672072), (16, 1045045), (20, 836036), (40, 418018), (47, 355760), (80, 209009), (94, 177880), (188, 88940), (235, 71152), (376, 44470), (470, 35576), (752, 22235), (940, 17788), (1880, 8894), (3760, 4447)]