51456880

素因数分解:

$2^4\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1289}}^1$

素因数の和:1801

約数の個数: 40

約数和(自身を含む): 119970000

約数和(自身を除く): 68513120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499, 998, 1289, 1996, 2495, 2578, 3992, 4990, 5156, 6445, 7984, 9980, 10312, 12890, 19960, 20624, 25780, 39920, 51560, 103120, 643211, 1286422, 2572844, 3216055, 5145688, 6432110, 10291376, 12864220, 25728440, 51456880]

約数ペア:

[(1, 51456880), (2, 25728440), (4, 12864220), (5, 10291376), (8, 6432110), (10, 5145688), (16, 3216055), (20, 2572844), (40, 1286422), (80, 643211), (499, 103120), (998, 51560), (1289, 39920), (1996, 25780), (2495, 20624), (2578, 19960), (3992, 12890), (4990, 10312), (5156, 9980), (6445, 7984)]