20687895

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27043}}^1$

素因数の和:27071

約数の個数: 24

約数和(自身を含む): 37969776

約数和(自身を除く): 17281881

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27043, 81129, 135215, 243387, 405645, 459731, 1216935, 1379193, 2298655, 4137579, 6895965, 20687895]

約数ペア:

[(1, 20687895), (3, 6895965), (5, 4137579), (9, 2298655), (15, 1379193), (17, 1216935), (45, 459731), (51, 405645), (85, 243387), (153, 135215), (255, 81129), (765, 27043)]