21245397

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{1049}}^1$

素因数の和:1252

約数の個数: 16

約数和(自身を含む): 29198400

約数和(自身を除く): 7953003

約数列:

[1, 3, 43, 129, 157, 471, 1049, 3147, 6751, 20253, 45107, 135321, 164693, 494079, 7081799, 21245397]

約数ペア:

[(1, 21245397), (3, 7081799), (43, 494079), (129, 164693), (157, 135321), (471, 45107), (1049, 20253), (3147, 6751)]