20864000

素因数分解:

$2^{10}\times 5^3\times {\mathrm{163}}^1$

素因数の和:198

約数の個数: 88

約数和(自身を含む): 52370448

約数和(自身を除く): 31506448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 163, 200, 250, 256, 320, 326, 400, 500, 512, 640, 652, 800, 815, 1000, 1024, 1280, 1304, 1600, 1630, 2000, 2560, 2608, 3200, 3260, 4000, 4075, 5120, 5216, 6400, 6520, 8000, 8150, 10432, 12800, 13040, 16000, 16300, 20375, 20864, 25600, 26080, 32000, 32600, 40750, 41728, 52160, 64000, 65200, 81500, 83456, 104320, 128000, 130400, 163000, 166912, 208640, 260800, 326000, 417280, 521600, 652000, 834560, 1043200, 1304000, 2086400, 2608000, 4172800, 5216000, 10432000, 20864000]

約数ペア:

[(1, 20864000), (2, 10432000), (4, 5216000), (5, 4172800), (8, 2608000), (10, 2086400), (16, 1304000), (20, 1043200), (25, 834560), (32, 652000), (40, 521600), (50, 417280), (64, 326000), (80, 260800), (100, 208640), (125, 166912), (128, 163000), (160, 130400), (163, 128000), (200, 104320), (250, 83456), (256, 81500), (320, 65200), (326, 64000), (400, 52160), (500, 41728), (512, 40750), (640, 32600), (652, 32000), (800, 26080), (815, 25600), (1000, 20864), (1024, 20375), (1280, 16300), (1304, 16000), (1600, 13040), (1630, 12800), (2000, 10432), (2560, 8150), (2608, 8000), (3200, 6520), (3260, 6400), (4000, 5216), (4075, 5120)]