21338819

素因数分解:

${\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:338

約数の個数: 16

約数和(自身を含む): 22923264

約数和(自身を除く): 1584445

約数列:

[1, 31, 41, 103, 163, 1271, 3193, 4223, 5053, 6683, 16789, 130913, 207173, 520459, 688349, 21338819]

約数ペア:

[(1, 21338819), (31, 688349), (41, 520459), (103, 207173), (163, 130913), (1271, 16789), (3193, 6683), (4223, 5053)]