21200187

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{887}}^1$

素因数の和:1178

約数の個数: 16

約数和(自身を含む): 29325312

約数和(自身を除く): 8125125

約数列:

[1, 3, 31, 93, 257, 771, 887, 2661, 7967, 23901, 27497, 82491, 227959, 683877, 7066729, 21200187]

約数ペア:

[(1, 21200187), (3, 7066729), (31, 683877), (93, 227959), (257, 82491), (771, 27497), (887, 23901), (2661, 7967)]