20563965

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26881}}^1$

素因数の和:26909

約数の個数: 24

約数和(自身を含む): 37742328

約数和(自身を除く): 17178363

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 26881, 80643, 134405, 241929, 403215, 456977, 1209645, 1370931, 2284885, 4112793, 6854655, 20563965]

約数ペア:

[(1, 20563965), (3, 6854655), (5, 4112793), (9, 2284885), (15, 1370931), (17, 1209645), (45, 456977), (51, 403215), (85, 241929), (153, 134405), (255, 80643), (765, 26881)]