207828999

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{479}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 352235520

約数和(自身を除く): 144406521

約数列:

[1, 3, 7, 9, 21, 63, 71, 97, 213, 291, 479, 497, 639, 679, 873, 1437, 1491, 2037, 3353, 4311, 4473, 6111, 6887, 10059, 20661, 30177, 34009, 46463, 48209, 61983, 102027, 139389, 144627, 238063, 306081, 325241, 418167, 433881, 714189, 975723, 2142567, 2927169, 3298873, 9896619, 23092111, 29689857, 69276333, 207828999]

約数ペア:

[(1, 207828999), (3, 69276333), (7, 29689857), (9, 23092111), (21, 9896619), (63, 3298873), (71, 2927169), (97, 2142567), (213, 975723), (291, 714189), (479, 433881), (497, 418167), (639, 325241), (679, 306081), (873, 238063), (1437, 144627), (1491, 139389), (2037, 102027), (3353, 61983), (4311, 48209), (4473, 46463), (6111, 34009), (6887, 30177), (10059, 20661)]