21986560

素因数分解:

$2^8\times 5^1\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:303

約数の個数: 72

約数和(自身を含む): 53532360

約数和(自身を除く): 31545800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 193, 256, 320, 356, 386, 445, 640, 712, 772, 890, 965, 1280, 1424, 1544, 1780, 1930, 2848, 3088, 3560, 3860, 5696, 6176, 7120, 7720, 11392, 12352, 14240, 15440, 17177, 22784, 24704, 28480, 30880, 34354, 49408, 56960, 61760, 68708, 85885, 113920, 123520, 137416, 171770, 247040, 274832, 343540, 549664, 687080, 1099328, 1374160, 2198656, 2748320, 4397312, 5496640, 10993280, 21986560]

約数ペア:

[(1, 21986560), (2, 10993280), (4, 5496640), (5, 4397312), (8, 2748320), (10, 2198656), (16, 1374160), (20, 1099328), (32, 687080), (40, 549664), (64, 343540), (80, 274832), (89, 247040), (128, 171770), (160, 137416), (178, 123520), (193, 113920), (256, 85885), (320, 68708), (356, 61760), (386, 56960), (445, 49408), (640, 34354), (712, 30880), (772, 28480), (890, 24704), (965, 22784), (1280, 17177), (1424, 15440), (1544, 14240), (1780, 12352), (1930, 11392), (2848, 7720), (3088, 7120), (3560, 6176), (3860, 5696)]