81591496

素因数分解:

$2^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{20521}}^1$

素因数の和:20605

約数の個数: 32

約数和(自身を含む): 177310080

約数和(自身を除く): 95718584

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 71, 142, 284, 497, 568, 994, 1988, 3976, 20521, 41042, 82084, 143647, 164168, 287294, 574588, 1149176, 1456991, 2913982, 5827964, 10198937, 11655928, 20397874, 40795748, 81591496]

約数ペア:

[(1, 81591496), (2, 40795748), (4, 20397874), (7, 11655928), (8, 10198937), (14, 5827964), (28, 2913982), (56, 1456991), (71, 1149176), (142, 574588), (284, 287294), (497, 164168), (568, 143647), (994, 82084), (1988, 41042), (3976, 20521)]