2787561

素因数分解:

$3^3\times 7^4\times {\mathrm{43}}^1$

素因数の和:80

約数の個数: 40

約数和(自身を含む): 4929760

約数和(自身を除く): 2142199

約数列:

[1, 3, 7, 9, 21, 27, 43, 49, 63, 129, 147, 189, 301, 343, 387, 441, 903, 1029, 1161, 1323, 2107, 2401, 2709, 3087, 6321, 7203, 8127, 9261, 14749, 18963, 21609, 44247, 56889, 64827, 103243, 132741, 309729, 398223, 929187, 2787561]

約数ペア:

[(1, 2787561), (3, 929187), (7, 398223), (9, 309729), (21, 132741), (27, 103243), (43, 64827), (49, 56889), (63, 44247), (129, 21609), (147, 18963), (189, 14749), (301, 9261), (343, 8127), (387, 7203), (441, 6321), (903, 3087), (1029, 2709), (1161, 2401), (1323, 2107)]