18657905

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{28057}}^1$

素因数の和:28088

約数の個数: 16

約数和(自身を含む): 26935680

約数和(自身を除く): 8277775

約数列:

[1, 5, 7, 19, 35, 95, 133, 665, 28057, 140285, 196399, 533083, 981995, 2665415, 3731581, 18657905]

約数ペア:

[(1, 18657905), (5, 3731581), (7, 2665415), (19, 981995), (35, 533083), (95, 196399), (133, 140285), (665, 28057)]