256804520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{917159}}^1$

素因数の和:917177

約数の個数: 32

約数和(自身を含む): 660355200

約数和(自身を除く): 403550680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 917159, 1834318, 3668636, 4585795, 6420113, 7337272, 9171590, 12840226, 18343180, 25680452, 32100565, 36686360, 51360904, 64201130, 128402260, 256804520]

約数ペア:

[(1, 256804520), (2, 128402260), (4, 64201130), (5, 51360904), (7, 36686360), (8, 32100565), (10, 25680452), (14, 18343180), (20, 12840226), (28, 9171590), (35, 7337272), (40, 6420113), (56, 4585795), (70, 3668636), (140, 1834318), (280, 917159)]