81274544

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390743}}^1$

素因数の和:390764

約数の個数: 20

約数和(自身を含む): 169582896

約数和(自身を除く): 88308352

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390743, 781486, 1562972, 3125944, 5079659, 6251888, 10159318, 20318636, 40637272, 81274544]

約数ペア:

[(1, 81274544), (2, 40637272), (4, 20318636), (8, 10159318), (13, 6251888), (16, 5079659), (26, 3125944), (52, 1562972), (104, 781486), (208, 390743)]