641000

素因数分解:

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

素因数の和:662

約数の個数: 32

約数和(自身を含む): 1502280

約数和(自身を除く): 861280

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 641, 1000, 1282, 2564, 3205, 5128, 6410, 12820, 16025, 25640, 32050, 64100, 80125, 128200, 160250, 320500, 641000]

約数ペア:

[(1, 641000), (2, 320500), (4, 160250), (5, 128200), (8, 80125), (10, 64100), (20, 32050), (25, 25640), (40, 16025), (50, 12820), (100, 6410), (125, 5128), (200, 3205), (250, 2564), (500, 1282), (641, 1000)]