81201328

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390391}}^1$

素因数の和:390412

約数の個数: 20

約数和(自身を含む): 169430128

約数和(自身を除く): 88228800

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390391, 780782, 1561564, 3123128, 5075083, 6246256, 10150166, 20300332, 40600664, 81201328]

約数ペア:

[(1, 81201328), (2, 40600664), (4, 20300332), (8, 10150166), (13, 6246256), (16, 5075083), (26, 3123128), (52, 1561564), (104, 780782), (208, 390391)]