21785393

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2879}}^1$

素因数の和:2956

約数の個数: 16

約数和(自身を含む): 26542080

約数和(自身を除く): 4756687

約数列:

[1, 7, 23, 47, 161, 329, 1081, 2879, 7567, 20153, 66217, 135313, 463519, 947191, 3112199, 21785393]

約数ペア:

[(1, 21785393), (7, 3112199), (23, 947191), (47, 463519), (161, 135313), (329, 66217), (1081, 20153), (2879, 7567)]