81458440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290923}}^1$

素因数の和:290941

約数の個数: 32

約数和(自身を含む): 209465280

約数和(自身を除く): 128006840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290923, 581846, 1163692, 1454615, 2036461, 2327384, 2909230, 4072922, 5818460, 8145844, 10182305, 11636920, 16291688, 20364610, 40729220, 81458440]

約数ペア:

[(1, 81458440), (2, 40729220), (4, 20364610), (5, 16291688), (7, 11636920), (8, 10182305), (10, 8145844), (14, 5818460), (20, 4072922), (28, 2909230), (35, 2327384), (40, 2036461), (56, 1454615), (70, 1163692), (140, 581846), (280, 290923)]