78891212

素因数分解:

$2^2\times {\mathrm{211}}^2\times {\mathrm{443}}^1$

素因数の和:869

約数の個数: 18

約数和(自身を含む): 139030164

約数和(自身を除く): 60138952

約数列:

[1, 2, 4, 211, 422, 443, 844, 886, 1772, 44521, 89042, 93473, 178084, 186946, 373892, 19722803, 39445606, 78891212]

約数ペア:

[(1, 78891212), (2, 39445606), (4, 19722803), (211, 373892), (422, 186946), (443, 178084), (844, 93473), (886, 89042), (1772, 44521)]