28399077

素因数分解:

$3^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{907}}^1$

素因数の和:998

約数の個数: 36

約数和(自身を含む): 48443616

約数和(自身を除く): 20044539

約数列:

[1, 3, 7, 9, 21, 49, 63, 71, 147, 213, 441, 497, 639, 907, 1491, 2721, 3479, 4473, 6349, 8163, 10437, 19047, 31311, 44443, 57141, 64397, 133329, 193191, 399987, 450779, 579573, 1352337, 3155453, 4057011, 9466359, 28399077]

約数ペア:

[(1, 28399077), (3, 9466359), (7, 4057011), (9, 3155453), (21, 1352337), (49, 579573), (63, 450779), (71, 399987), (147, 193191), (213, 133329), (441, 64397), (497, 57141), (639, 44443), (907, 31311), (1491, 19047), (2721, 10437), (3479, 8163), (4473, 6349)]