20978240

素因数分解:

$2^6\times 5^1\times {\mathrm{65557}}^1$

素因数の和:65574

約数の個数: 28

約数和(自身を含む): 49955196

約数和(自身を除く): 28976956

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65557, 131114, 262228, 327785, 524456, 655570, 1048912, 1311140, 2097824, 2622280, 4195648, 5244560, 10489120, 20978240]

約数ペア:

[(1, 20978240), (2, 10489120), (4, 5244560), (5, 4195648), (8, 2622280), (10, 2097824), (16, 1311140), (20, 1048912), (32, 655570), (40, 524456), (64, 327785), (80, 262228), (160, 131114), (320, 65557)]