81289220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213919}}^1$

素因数の和:213947

約数の個数: 24

約数和(自身を含む): 179692800

約数和(自身を除く): 98403580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213919, 427838, 855676, 1069595, 2139190, 4064461, 4278380, 8128922, 16257844, 20322305, 40644610, 81289220]

約数ペア:

[(1, 81289220), (2, 40644610), (4, 20322305), (5, 16257844), (10, 8128922), (19, 4278380), (20, 4064461), (38, 2139190), (76, 1069595), (95, 855676), (190, 427838), (380, 213919)]