1978398380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{111271}}^1$

素因数の和:111414

約数の個数: 48

約数和(自身を含む): 4785586176

約数和(自身を除く): 2807187796

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1270, 1778, 2540, 3556, 4445, 8890, 17780, 111271, 222542, 445084, 556355, 778897, 1112710, 1557794, 2225420, 3115588, 3894485, 7788970, 14131417, 15577940, 28262834, 56525668, 70657085, 98919919, 141314170, 197839838, 282628340, 395679676, 494599595, 989199190, 1978398380]

約数ペア:

[(1, 1978398380), (2, 989199190), (4, 494599595), (5, 395679676), (7, 282628340), (10, 197839838), (14, 141314170), (20, 98919919), (28, 70657085), (35, 56525668), (70, 28262834), (127, 15577940), (140, 14131417), (254, 7788970), (508, 3894485), (635, 3115588), (889, 2225420), (1270, 1557794), (1778, 1112710), (2540, 778897), (3556, 556355), (4445, 445084), (8890, 222542), (17780, 111271)]