256425813

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{919}}^1$

素因数の和:1078

約数の個数: 48

約数和(自身を含む): 437831680

約数和(自身を除く): 181405867

約数列:

[1, 3, 7, 9, 21, 43, 63, 103, 129, 301, 309, 387, 721, 903, 919, 927, 2163, 2709, 2757, 4429, 6433, 6489, 8271, 13287, 19299, 31003, 39517, 39861, 57897, 93009, 94657, 118551, 276619, 279027, 283971, 355653, 662599, 829857, 851913, 1987797, 2489571, 4070251, 5963391, 12210753, 28491757, 36632259, 85475271, 256425813]

約数ペア:

[(1, 256425813), (3, 85475271), (7, 36632259), (9, 28491757), (21, 12210753), (43, 5963391), (63, 4070251), (103, 2489571), (129, 1987797), (301, 851913), (309, 829857), (387, 662599), (721, 355653), (903, 283971), (919, 279027), (927, 276619), (2163, 118551), (2709, 94657), (2757, 93009), (4429, 57897), (6433, 39861), (6489, 39517), (8271, 31003), (13287, 19299)]