66781168

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{245519}}^1$

素因数の和:245544

約数の個数: 20

約数和(自身を含む): 137000160

約数和(自身を除く): 70218992

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 245519, 491038, 982076, 1964152, 3928304, 4173823, 8347646, 16695292, 33390584, 66781168]

約数ペア:

[(1, 66781168), (2, 33390584), (4, 16695292), (8, 8347646), (16, 4173823), (17, 3928304), (34, 1964152), (68, 982076), (136, 491038), (272, 245519)]