20978640

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{29137}}^1$

素因数の和:29156

約数の個数: 60

約数和(自身を含む): 70455684

約数和(自身を除く): 49477044

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 29137, 58274, 87411, 116548, 145685, 174822, 233096, 262233, 291370, 349644, 437055, 466192, 524466, 582740, 699288, 874110, 1048932, 1165480, 1311165, 1398576, 1748220, 2097864, 2330960, 2622330, 3496440, 4195728, 5244660, 6992880, 10489320, 20978640]

約数ペア:

[(1, 20978640), (2, 10489320), (3, 6992880), (4, 5244660), (5, 4195728), (6, 3496440), (8, 2622330), (9, 2330960), (10, 2097864), (12, 1748220), (15, 1398576), (16, 1311165), (18, 1165480), (20, 1048932), (24, 874110), (30, 699288), (36, 582740), (40, 524466), (45, 466192), (48, 437055), (60, 349644), (72, 291370), (80, 262233), (90, 233096), (120, 174822), (144, 145685), (180, 116548), (240, 87411), (360, 58274), (720, 29137)]