18926420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23081}}^1$

素因数の和:23131

約数の個数: 24

約数和(自身を含む): 40716648

約数和(自身を除く): 21790228

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 23081, 46162, 92324, 115405, 230810, 461620, 946321, 1892642, 3785284, 4731605, 9463210, 18926420]

約数ペア:

[(1, 18926420), (2, 9463210), (4, 4731605), (5, 3785284), (10, 1892642), (20, 946321), (41, 461620), (82, 230810), (164, 115405), (205, 92324), (410, 46162), (820, 23081)]