20561191

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{353}}^1$

素因数の和:570

約数の個数: 16

約数和(自身を含む): 24162624

約数和(自身を除く): 3601433

約数列:

[1, 7, 53, 157, 353, 371, 1099, 2471, 8321, 18709, 55421, 58247, 130963, 387947, 2937313, 20561191]

約数ペア:

[(1, 20561191), (7, 2937313), (53, 387947), (157, 130963), (353, 58247), (371, 55421), (1099, 18709), (2471, 8321)]