21077145

素因数分解:

$3^3\times 5^1\times {\mathrm{156127}}^1$

素因数の和:156141

約数の個数: 16

約数和(自身を含む): 37470720

約数和(自身を除く): 16393575

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156127, 468381, 780635, 1405143, 2341905, 4215429, 7025715, 21077145]

約数ペア:

[(1, 21077145), (3, 7025715), (5, 4215429), (9, 2341905), (15, 1405143), (27, 780635), (45, 468381), (135, 156127)]