20512000

素因数分解:

$2^8\times 5^3\times {\mathrm{641}}^1$

素因数の和:672

約数の個数: 72

約数和(自身を含む): 51177672

約数和(自身を除く): 30665672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 640, 641, 800, 1000, 1280, 1282, 1600, 2000, 2564, 3200, 3205, 4000, 5128, 6400, 6410, 8000, 10256, 12820, 16000, 16025, 20512, 25640, 32000, 32050, 41024, 51280, 64100, 80125, 82048, 102560, 128200, 160250, 164096, 205120, 256400, 320500, 410240, 512800, 641000, 820480, 1025600, 1282000, 2051200, 2564000, 4102400, 5128000, 10256000, 20512000]

約数ペア:

[(1, 20512000), (2, 10256000), (4, 5128000), (5, 4102400), (8, 2564000), (10, 2051200), (16, 1282000), (20, 1025600), (25, 820480), (32, 641000), (40, 512800), (50, 410240), (64, 320500), (80, 256400), (100, 205120), (125, 164096), (128, 160250), (160, 128200), (200, 102560), (250, 82048), (256, 80125), (320, 64100), (400, 51280), (500, 41024), (640, 32050), (641, 32000), (800, 25640), (1000, 20512), (1280, 16025), (1282, 16000), (1600, 12820), (2000, 10256), (2564, 8000), (3200, 6410), (3205, 6400), (4000, 5128)]