18996940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23167}}^1$

素因数の和:23217

約数の個数: 24

約数和(自身を含む): 40868352

約数和(自身を除く): 21871412

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 23167, 46334, 92668, 115835, 231670, 463340, 949847, 1899694, 3799388, 4749235, 9498470, 18996940]

約数ペア:

[(1, 18996940), (2, 9498470), (4, 4749235), (5, 3799388), (10, 1899694), (20, 949847), (41, 463340), (82, 231670), (164, 115835), (205, 92668), (410, 46334), (820, 23167)]