21491029

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{1021}}^1$

素因数の和:1156

約数の個数: 16

約数和(自身を含む): 25639936

約数和(自身を除く): 4148907

約数列:

[1, 7, 31, 97, 217, 679, 1021, 3007, 7147, 21049, 31651, 99037, 221557, 693259, 3070147, 21491029]

約数ペア:

[(1, 21491029), (7, 3070147), (31, 693259), (97, 221557), (217, 99037), (679, 31651), (1021, 21049), (3007, 7147)]