18668240

素因数分解:

$2^4\times 5^1\times {\mathrm{233353}}^1$

素因数の和:233366

約数の個数: 20

約数和(自身を含む): 43403844

約数和(自身を除く): 24735604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 233353, 466706, 933412, 1166765, 1866824, 2333530, 3733648, 4667060, 9334120, 18668240]

約数ペア:

[(1, 18668240), (2, 9334120), (4, 4667060), (5, 3733648), (8, 2333530), (10, 1866824), (16, 1166765), (20, 933412), (40, 466706), (80, 233353)]