278309380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{641}}^1\times {\mathrm{1277}}^1$

素因数の和:1944

約数の個数: 48

約数和(自身を含む): 620279856

約数和(自身を除く): 341970476

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 641, 1277, 1282, 2554, 2564, 3205, 5108, 6385, 6410, 10897, 12770, 12820, 21709, 21794, 25540, 43418, 43588, 54485, 86836, 108545, 108970, 217090, 217940, 434180, 818557, 1637114, 3274228, 4092785, 8185570, 13915469, 16371140, 27830938, 55661876, 69577345, 139154690, 278309380]

約数ペア:

[(1, 278309380), (2, 139154690), (4, 69577345), (5, 55661876), (10, 27830938), (17, 16371140), (20, 13915469), (34, 8185570), (68, 4092785), (85, 3274228), (170, 1637114), (340, 818557), (641, 434180), (1277, 217940), (1282, 217090), (2554, 108970), (2564, 108545), (3205, 86836), (5108, 54485), (6385, 43588), (6410, 43418), (10897, 25540), (12770, 21794), (12820, 21709)]