6410000

素因数分解:

$2^4\times 5^4\times {\mathrm{641}}^1$

素因数の和:669

約数の個数: 50

約数和(自身を含む): 15543462

約数和(自身を除く): 9133462

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 641, 1000, 1250, 1282, 2000, 2500, 2564, 3205, 5000, 5128, 6410, 10000, 10256, 12820, 16025, 25640, 32050, 51280, 64100, 80125, 128200, 160250, 256400, 320500, 400625, 641000, 801250, 1282000, 1602500, 3205000, 6410000]

約数ペア:

[(1, 6410000), (2, 3205000), (4, 1602500), (5, 1282000), (8, 801250), (10, 641000), (16, 400625), (20, 320500), (25, 256400), (40, 160250), (50, 128200), (80, 80125), (100, 64100), (125, 51280), (200, 32050), (250, 25640), (400, 16025), (500, 12820), (625, 10256), (641, 10000), (1000, 6410), (1250, 5128), (1282, 5000), (2000, 3205), (2500, 2564)]