20889787

素因数分解:

${\mathrm{17}}^2\times {\mathrm{41}}^2\times {\mathrm{43}}^1$

素因数の和:159

約数の個数: 18

約数和(自身を含む): 23274284

約数和(自身を除く): 2384497

約数列:

[1, 17, 41, 43, 289, 697, 731, 1681, 1763, 11849, 12427, 28577, 29971, 72283, 485809, 509507, 1228811, 20889787]

約数ペア:

[(1, 20889787), (17, 1228811), (41, 509507), (43, 485809), (289, 72283), (697, 29971), (731, 28577), (1681, 12427), (1763, 11849)]