661555

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:246

約数の個数: 16

約数和(自身を含む): 864864

約数和(自身を除く): 203309

約数列:

[1, 5, 17, 43, 85, 181, 215, 731, 905, 3077, 3655, 7783, 15385, 38915, 132311, 661555]

約数ペア:

[(1, 661555), (5, 132311), (17, 38915), (43, 15385), (85, 7783), (181, 3655), (215, 3077), (731, 905)]