19980291

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1\times {\mathrm{719}}^1$

素因数の和:938

約数の個数: 16

約数和(自身を含む): 27302400

約数和(自身を除く): 7322109

約数列:

[1, 3, 59, 157, 177, 471, 719, 2157, 9263, 27789, 42421, 112883, 127263, 338649, 6660097, 19980291]

約数ペア:

[(1, 19980291), (3, 6660097), (59, 338649), (157, 127263), (177, 112883), (471, 42421), (719, 27789), (2157, 9263)]