256422140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{986239}}^1$

素因数の和:986261

約数の個数: 24

約数和(自身を含む): 579909120

約数和(自身を除く): 323486980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 986239, 1972478, 3944956, 4931195, 9862390, 12821107, 19724780, 25642214, 51284428, 64105535, 128211070, 256422140]

約数ペア:

[(1, 256422140), (2, 128211070), (4, 64105535), (5, 51284428), (10, 25642214), (13, 19724780), (20, 12821107), (26, 9862390), (52, 4931195), (65, 3944956), (130, 1972478), (260, 986239)]