21931785

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28669}}^1$

素因数の和:28697

約数の個数: 24

約数和(自身を含む): 40252680

約数和(自身を除く): 18320895

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28669, 86007, 143345, 258021, 430035, 487373, 1290105, 1462119, 2436865, 4386357, 7310595, 21931785]

約数ペア:

[(1, 21931785), (3, 7310595), (5, 4386357), (9, 2436865), (15, 1462119), (17, 1290105), (45, 487373), (51, 430035), (85, 258021), (153, 143345), (255, 86007), (765, 28669)]