221565771

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{173}}^1\times {\mathrm{701}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 381101760

約数和(自身を除く): 159535989

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 173, 203, 261, 519, 609, 701, 1211, 1557, 1827, 2103, 3633, 4907, 5017, 6309, 10899, 14721, 15051, 20329, 35119, 44163, 45153, 60987, 105357, 121273, 142303, 182961, 316071, 363819, 426909, 848911, 1091457, 1280727, 2546733, 3516917, 7640199, 10550751, 24618419, 31652253, 73855257, 221565771]

約数ペア:

[(1, 221565771), (3, 73855257), (7, 31652253), (9, 24618419), (21, 10550751), (29, 7640199), (63, 3516917), (87, 2546733), (173, 1280727), (203, 1091457), (261, 848911), (519, 426909), (609, 363819), (701, 316071), (1211, 182961), (1557, 142303), (1827, 121273), (2103, 105357), (3633, 60987), (4907, 45153), (5017, 44163), (6309, 35119), (10899, 20329), (14721, 15051)]