28220787

素因数分解:

$3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{2251}}^1$

素因数の和:2463

約数の個数: 24

約数和(自身を含む): 46841600

約数和(自身を除く): 18620813

約数列:

[1, 3, 7, 9, 21, 63, 199, 597, 1393, 1791, 2251, 4179, 6753, 12537, 15757, 20259, 47271, 141813, 447949, 1343847, 3135643, 4031541, 9406929, 28220787]

約数ペア:

[(1, 28220787), (3, 9406929), (7, 4031541), (9, 3135643), (21, 1343847), (63, 447949), (199, 141813), (597, 47271), (1393, 20259), (1791, 15757), (2251, 12537), (4179, 6753)]