18978861

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{2579}}^1$

素因数の和:2816

約数の個数: 16

約数和(自身を含む): 27740160

約数和(自身を除く): 8761299

約数列:

[1, 3, 11, 33, 223, 669, 2453, 2579, 7359, 7737, 28369, 85107, 575117, 1725351, 6326287, 18978861]

約数ペア:

[(1, 18978861), (3, 6326287), (11, 1725351), (33, 575117), (223, 85107), (669, 28369), (2453, 7737), (2579, 7359)]