81605316

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{1279}}^1$

素因数の和:1708

約数の個数: 48

約数和(自身を含む): 205721600

約数和(自身を除く): 124116284

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 409, 818, 1227, 1279, 1636, 2454, 2558, 3837, 4908, 5116, 5317, 7674, 10634, 15348, 15951, 16627, 21268, 31902, 33254, 49881, 63804, 66508, 99762, 199524, 523111, 1046222, 1569333, 2092444, 3138666, 6277332, 6800443, 13600886, 20401329, 27201772, 40802658, 81605316]

約数ペア:

[(1, 81605316), (2, 40802658), (3, 27201772), (4, 20401329), (6, 13600886), (12, 6800443), (13, 6277332), (26, 3138666), (39, 2092444), (52, 1569333), (78, 1046222), (156, 523111), (409, 199524), (818, 99762), (1227, 66508), (1279, 63804), (1636, 49881), (2454, 33254), (2558, 31902), (3837, 21268), (4908, 16627), (5116, 15951), (5317, 15348), (7674, 10634)]