19911207

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{347}}^1\times {\mathrm{617}}^1$

素因数の和:998

約数の個数: 16

約数和(自身を含む): 27528192

約数和(自身を除く): 7616985

約数列:

[1, 3, 31, 93, 347, 617, 1041, 1851, 10757, 19127, 32271, 57381, 214099, 642297, 6637069, 19911207]

約数ペア:

[(1, 19911207), (3, 6637069), (31, 642297), (93, 214099), (347, 57381), (617, 32271), (1041, 19127), (1851, 10757)]