205120000

素因数分解:

$2^9\times 5^4\times {\mathrm{641}}^1$

素因数の和:679

約数の個数: 100

約数和(自身を含む): 512934246

約数和(自身を除く): 307814246

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, 512, 625, 640, 641, 800, 1000, 1250, 1280, 1282, 1600, 2000, 2500, 2560, 2564, 3200, 3205, 4000, 5000, 5128, 6400, 6410, 8000, 10000, 10256, 12800, 12820, 16000, 16025, 20000, 20512, 25640, 32000, 32050, 40000, 41024, 51280, 64000, 64100, 80000, 80125, 82048, 102560, 128200, 160000, 160250, 164096, 205120, 256400, 320000, 320500, 328192, 400625, 410240, 512800, 641000, 801250, 820480, 1025600, 1282000, 1602500, 1640960, 2051200, 2564000, 3205000, 4102400, 5128000, 6410000, 8204800, 10256000, 12820000, 20512000, 25640000, 41024000, 51280000, 102560000, 205120000]

約数ペア:

[(1, 205120000), (2, 102560000), (4, 51280000), (5, 41024000), (8, 25640000), (10, 20512000), (16, 12820000), (20, 10256000), (25, 8204800), (32, 6410000), (40, 5128000), (50, 4102400), (64, 3205000), (80, 2564000), (100, 2051200), (125, 1640960), (128, 1602500), (160, 1282000), (200, 1025600), (250, 820480), (256, 801250), (320, 641000), (400, 512800), (500, 410240), (512, 400625), (625, 328192), (640, 320500), (641, 320000), (800, 256400), (1000, 205120), (1250, 164096), (1280, 160250), (1282, 160000), (1600, 128200), (2000, 102560), (2500, 82048), (2560, 80125), (2564, 80000), (3200, 64100), (3205, 64000), (4000, 51280), (5000, 41024), (5128, 40000), (6400, 32050), (6410, 32000), (8000, 25640), (10000, 20512), (10256, 20000), (12800, 16025), (12820, 16000)]