21351465

素因数分解:

$3^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1451}}^1$

素因数の和:1574

約数の個数: 32

約数和(自身を含む): 38332800

約数和(自身を除く): 16981335

約数列:

[1, 3, 5, 9, 15, 27, 45, 109, 135, 327, 545, 981, 1451, 1635, 2943, 4353, 4905, 7255, 13059, 14715, 21765, 39177, 65295, 158159, 195885, 474477, 790795, 1423431, 2372385, 4270293, 7117155, 21351465]

約数ペア:

[(1, 21351465), (3, 7117155), (5, 4270293), (9, 2372385), (15, 1423431), (27, 790795), (45, 474477), (109, 195885), (135, 158159), (327, 65295), (545, 39177), (981, 21765), (1451, 14715), (1635, 13059), (2943, 7255), (4353, 4905)]