647668845

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{208589}}^1$

素因数の和:208626

約数の個数: 32

約数和(自身を含む): 1201478400

約数和(自身を除く): 553809555

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 208589, 625767, 1042945, 1877301, 3128835, 4797547, 5631903, 9386505, 14392641, 23987735, 28159515, 43177923, 71963205, 129533769, 215889615, 647668845]

約数ペア:

[(1, 647668845), (3, 215889615), (5, 129533769), (9, 71963205), (15, 43177923), (23, 28159515), (27, 23987735), (45, 14392641), (69, 9386505), (115, 5631903), (135, 4797547), (207, 3128835), (345, 1877301), (621, 1042945), (1035, 625767), (3105, 208589)]