81178864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{881}}^1$

素因数の和:1345

約数の個数: 40

約数和(自身を含む): 169957872

約数和(自身を除く): 88779008

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 443, 881, 886, 1762, 1772, 3524, 3544, 5759, 7048, 7088, 11453, 11518, 14096, 22906, 23036, 45812, 46072, 91624, 92144, 183248, 390283, 780566, 1561132, 3122264, 5073679, 6244528, 10147358, 20294716, 40589432, 81178864]

約数ペア:

[(1, 81178864), (2, 40589432), (4, 20294716), (8, 10147358), (13, 6244528), (16, 5073679), (26, 3122264), (52, 1561132), (104, 780566), (208, 390283), (443, 183248), (881, 92144), (886, 91624), (1762, 46072), (1772, 45812), (3524, 23036), (3544, 22906), (5759, 14096), (7048, 11518), (7088, 11453)]