19887705

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{25997}}^1$

素因数の和:26025

約数の個数: 24

約数和(自身を含む): 36501192

約数和(自身を除く): 16613487

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 25997, 77991, 129985, 233973, 389955, 441949, 1169865, 1325847, 2209745, 3977541, 6629235, 19887705]

約数ペア:

[(1, 19887705), (3, 6629235), (5, 3977541), (9, 2209745), (15, 1325847), (17, 1169865), (45, 441949), (51, 389955), (85, 233973), (153, 129985), (255, 77991), (765, 25997)]