18268804940

素因数分解:

$2^2\times 5^1\times {\mathrm{2087}}^1\times {\mathrm{437681}}^1$

素因数の和:439777

約数の個数: 24

約数和(自身を含む): 38382960672

約数和(自身を除く): 20114155732

約数列:

[1, 2, 4, 5, 10, 20, 2087, 4174, 8348, 10435, 20870, 41740, 437681, 875362, 1750724, 2188405, 4376810, 8753620, 913440247, 1826880494, 3653760988, 4567201235, 9134402470, 18268804940]

約数ペア:

[(1, 18268804940), (2, 9134402470), (4, 4567201235), (5, 3653760988), (10, 1826880494), (20, 913440247), (2087, 8753620), (4174, 4376810), (8348, 2188405), (10435, 1750724), (20870, 875362), (41740, 437681)]