20699145

素因数分解:

$3^4\times 5^1\times {\mathrm{51109}}^1$

素因数の和:51126

約数の個数: 20

約数和(自身を含む): 37105860

約数和(自身を除く): 16406715

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51109, 153327, 255545, 459981, 766635, 1379943, 2299905, 4139829, 6899715, 20699145]

約数ペア:

[(1, 20699145), (3, 6899715), (5, 4139829), (9, 2299905), (15, 1379943), (27, 766635), (45, 459981), (81, 255545), (135, 153327), (405, 51109)]