20401785

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26669}}^1$

素因数の和:26697

約数の個数: 24

約数和(自身を含む): 37444680

約数和(自身を除く): 17042895

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 26669, 80007, 133345, 240021, 400035, 453373, 1200105, 1360119, 2266865, 4080357, 6800595, 20401785]

約数ペア:

[(1, 20401785), (3, 6800595), (5, 4080357), (9, 2266865), (15, 1360119), (17, 1200105), (45, 453373), (51, 400035), (85, 240021), (153, 133345), (255, 80007), (765, 26669)]