18020540

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2203}}^1$

素因数の和:2621

約数の個数: 24

約数和(自身を含む): 37952880

約数和(自身を除く): 19932340

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2203, 4090, 4406, 8180, 8812, 11015, 22030, 44060, 901027, 1802054, 3604108, 4505135, 9010270, 18020540]

約数ペア:

[(1, 18020540), (2, 9010270), (4, 4505135), (5, 3604108), (10, 1802054), (20, 901027), (409, 44060), (818, 22030), (1636, 11015), (2045, 8812), (2203, 8180), (4090, 4406)]