21616640

素因数分解:

$2^{11}\times 5^1\times {\mathrm{2111}}^1$

素因数の和:2138

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 30275200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2048, 2111, 2560, 4222, 5120, 8444, 10240, 10555, 16888, 21110, 33776, 42220, 67552, 84440, 135104, 168880, 270208, 337760, 540416, 675520, 1080832, 1351040, 2161664, 2702080, 4323328, 5404160, 10808320, 21616640]

約数ペア:

[(1, 21616640), (2, 10808320), (4, 5404160), (5, 4323328), (8, 2702080), (10, 2161664), (16, 1351040), (20, 1080832), (32, 675520), (40, 540416), (64, 337760), (80, 270208), (128, 168880), (160, 135104), (256, 84440), (320, 67552), (512, 42220), (640, 33776), (1024, 21110), (1280, 16888), (2048, 10555), (2111, 10240), (2560, 8444), (4222, 5120)]