2564000

素因数分解:

$2^5\times 5^3\times {\mathrm{641}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 6309576

約数和(自身を除く): 3745576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 641, 800, 1000, 1282, 2000, 2564, 3205, 4000, 5128, 6410, 10256, 12820, 16025, 20512, 25640, 32050, 51280, 64100, 80125, 102560, 128200, 160250, 256400, 320500, 512800, 641000, 1282000, 2564000]

約数ペア:

[(1, 2564000), (2, 1282000), (4, 641000), (5, 512800), (8, 320500), (10, 256400), (16, 160250), (20, 128200), (25, 102560), (32, 80125), (40, 64100), (50, 51280), (80, 32050), (100, 25640), (125, 20512), (160, 16025), (200, 12820), (250, 10256), (400, 6410), (500, 5128), (641, 4000), (800, 3205), (1000, 2564), (1282, 2000)]