21199983

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7949}}^1$

素因数の和:8086

約数の個数: 16

約数和(自身を含む): 32563200

約数和(自身を除く): 11363217

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7949, 23847, 55643, 166929, 1009523, 3028569, 7066661, 21199983]

約数ペア:

[(1, 21199983), (3, 7066661), (7, 3028569), (21, 1009523), (127, 166929), (381, 55643), (889, 23847), (2667, 7949)]