19952989

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{439}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 23541760

約数和(自身を除く): 3588771

約数列:

[1, 7, 43, 151, 301, 439, 1057, 3073, 6493, 18877, 45451, 66289, 132139, 464023, 2850427, 19952989]

約数ペア:

[(1, 19952989), (7, 2850427), (43, 464023), (151, 132139), (301, 66289), (439, 45451), (1057, 18877), (3073, 6493)]