28761321

素因数分解:

$3^1\times {\mathrm{37}}^2\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:273

約数の個数: 24

約数和(自身を含む): 40521600

約数和(自身を除く): 11760279

約数列:

[1, 3, 37, 47, 111, 141, 149, 447, 1369, 1739, 4107, 5217, 5513, 7003, 16539, 21009, 64343, 193029, 203981, 259111, 611943, 777333, 9587107, 28761321]

約数ペア:

[(1, 28761321), (3, 9587107), (37, 777333), (47, 611943), (111, 259111), (141, 203981), (149, 193029), (447, 64343), (1369, 21009), (1739, 16539), (4107, 7003), (5217, 5513)]