20918655

素因数分解:

$3^7\times 5^1\times {\mathrm{1913}}^1$

素因数の和:1939

約数の個数: 32

約数和(自身を含む): 37667520

約数和(自身を除く): 16748865

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 1913, 2187, 3645, 5739, 9565, 10935, 17217, 28695, 51651, 86085, 154953, 258255, 464859, 774765, 1394577, 2324295, 4183731, 6972885, 20918655]

約数ペア:

[(1, 20918655), (3, 6972885), (5, 4183731), (9, 2324295), (15, 1394577), (27, 774765), (45, 464859), (81, 258255), (135, 154953), (243, 86085), (405, 51651), (729, 28695), (1215, 17217), (1913, 10935), (2187, 9565), (3645, 5739)]