19961840

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5309}}^1$

素因数の和:5369

約数の個数: 40

約数和(自身を含む): 47407680

約数和(自身を除く): 27445840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5309, 10618, 21236, 26545, 42472, 53090, 84944, 106180, 212360, 249523, 424720, 499046, 998092, 1247615, 1996184, 2495230, 3992368, 4990460, 9980920, 19961840]

約数ペア:

[(1, 19961840), (2, 9980920), (4, 4990460), (5, 3992368), (8, 2495230), (10, 1996184), (16, 1247615), (20, 998092), (40, 499046), (47, 424720), (80, 249523), (94, 212360), (188, 106180), (235, 84944), (376, 53090), (470, 42472), (752, 26545), (940, 21236), (1880, 10618), (3760, 5309)]