138220040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{493643}}^1$

素因数の和:493661

約数の個数: 32

約数和(自身を含む): 355423680

約数和(自身を除く): 217203640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 493643, 987286, 1974572, 2468215, 3455501, 3949144, 4936430, 6911002, 9872860, 13822004, 17277505, 19745720, 27644008, 34555010, 69110020, 138220040]

約数ペア:

[(1, 138220040), (2, 69110020), (4, 34555010), (5, 27644008), (7, 19745720), (8, 17277505), (10, 13822004), (14, 9872860), (20, 6911002), (28, 4936430), (35, 3949144), (40, 3455501), (56, 2468215), (70, 1974572), (140, 987286), (280, 493643)]