21785780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{57331}}^1$

素因数の和:57359

約数の個数: 24

約数和(自身を含む): 48158880

約数和(自身を除く): 26373100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 57331, 114662, 229324, 286655, 573310, 1089289, 1146620, 2178578, 4357156, 5446445, 10892890, 21785780]

約数ペア:

[(1, 21785780), (2, 10892890), (4, 5446445), (5, 4357156), (10, 2178578), (19, 1146620), (20, 1089289), (38, 573310), (76, 286655), (95, 229324), (190, 114662), (380, 57331)]