28255815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{331}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 56349696

約数和(自身を除く): 28093881

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 271, 315, 331, 813, 993, 1355, 1655, 1897, 2317, 2439, 2979, 4065, 4965, 5691, 6951, 9485, 11585, 12195, 14895, 17073, 20853, 28455, 34755, 85365, 89701, 104265, 269103, 448505, 627907, 807309, 1345515, 1883721, 3139535, 4036545, 5651163, 9418605, 28255815]

約数ペア:

[(1, 28255815), (3, 9418605), (5, 5651163), (7, 4036545), (9, 3139535), (15, 1883721), (21, 1345515), (35, 807309), (45, 627907), (63, 448505), (105, 269103), (271, 104265), (315, 89701), (331, 85365), (813, 34755), (993, 28455), (1355, 20853), (1655, 17073), (1897, 14895), (2317, 12195), (2439, 11585), (2979, 9485), (4065, 6951), (4965, 5691)]