19917903

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{3511}}^1$

素因数の和:3606

約数の個数: 16

約数和(自身を含む): 27871232

約数和(自身を除く): 7953329

約数列:

[1, 3, 31, 61, 93, 183, 1891, 3511, 5673, 10533, 108841, 214171, 326523, 642513, 6639301, 19917903]

約数ペア:

[(1, 19917903), (3, 6639301), (31, 642513), (61, 326523), (93, 214171), (183, 108841), (1891, 10533), (3511, 5673)]