21080120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27737}}^1$

素因数の和:27767

約数の個数: 32

約数和(自身を含む): 49928400

約数和(自身を除く): 28848280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27737, 55474, 110948, 138685, 221896, 277370, 527003, 554740, 1054006, 1109480, 2108012, 2635015, 4216024, 5270030, 10540060, 21080120]

約数ペア:

[(1, 21080120), (2, 10540060), (4, 5270030), (5, 4216024), (8, 2635015), (10, 2108012), (19, 1109480), (20, 1054006), (38, 554740), (40, 527003), (76, 277370), (95, 221896), (152, 138685), (190, 110948), (380, 55474), (760, 27737)]