278580920

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{65089}}^1$

素因数の和:65207

約数の個数: 32

約数和(自身を含む): 632674800

約数和(自身を除く): 354093880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 65089, 130178, 260356, 325445, 520712, 650890, 1301780, 2603560, 6964523, 13929046, 27858092, 34822615, 55716184, 69645230, 139290460, 278580920]

約数ペア:

[(1, 278580920), (2, 139290460), (4, 69645230), (5, 55716184), (8, 34822615), (10, 27858092), (20, 13929046), (40, 6964523), (107, 2603560), (214, 1301780), (428, 650890), (535, 520712), (856, 325445), (1070, 260356), (2140, 130178), (4280, 65089)]