20785815

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3019}}^1$

素因数の和:3053

約数の個数: 40

約数和(自身を含む): 39465360

約数和(自身を除く): 18679545

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 255, 405, 459, 765, 1377, 2295, 3019, 6885, 9057, 15095, 27171, 45285, 51323, 81513, 135855, 153969, 244539, 256615, 407565, 461907, 769845, 1222695, 1385721, 2309535, 4157163, 6928605, 20785815]

約数ペア:

[(1, 20785815), (3, 6928605), (5, 4157163), (9, 2309535), (15, 1385721), (17, 1222695), (27, 769845), (45, 461907), (51, 407565), (81, 256615), (85, 244539), (135, 153969), (153, 135855), (255, 81513), (405, 51323), (459, 45285), (765, 27171), (1377, 15095), (2295, 9057), (3019, 6885)]