20320420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24781}}^1$

素因数の和:24831

約数の個数: 24

約数和(自身を含む): 43715448

約数和(自身を除く): 23395028

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 24781, 49562, 99124, 123905, 247810, 495620, 1016021, 2032042, 4064084, 5080105, 10160210, 20320420]

約数ペア:

[(1, 20320420), (2, 10160210), (4, 5080105), (5, 4064084), (10, 2032042), (20, 1016021), (41, 495620), (82, 247810), (164, 123905), (205, 99124), (410, 49562), (820, 24781)]