19908897

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{619}}^1$

素因数の和:844

約数の個数: 16

約数和(自身を含む): 27141120

約数和(自身を除く): 7232223

約数列:

[1, 3, 71, 151, 213, 453, 619, 1857, 10721, 32163, 43949, 93469, 131847, 280407, 6636299, 19908897]

約数ペア:

[(1, 19908897), (3, 6636299), (71, 280407), (151, 131847), (213, 93469), (453, 43949), (619, 32163), (1857, 10721)]