640720083

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{317}}^1$

素因数の和:627

約数の個数: 32

約数和(自身を含む): 893249280

約数和(自身を除く): 252529197

約数列:

[1, 3, 37, 111, 131, 139, 317, 393, 417, 951, 4847, 5143, 11729, 14541, 15429, 18209, 35187, 41527, 44063, 54627, 124581, 132189, 673733, 1536499, 1630331, 2021199, 4609497, 4890993, 5772253, 17316759, 213573361, 640720083]

約数ペア:

[(1, 640720083), (3, 213573361), (37, 17316759), (111, 5772253), (131, 4890993), (139, 4609497), (317, 2021199), (393, 1630331), (417, 1536499), (951, 673733), (4847, 132189), (5143, 124581), (11729, 54627), (14541, 44063), (15429, 41527), (18209, 35187)]