28725291

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{26821}}^1$

素因数の和:26851

約数の個数: 24

約数和(自身を含む): 50210784

約数和(自身を除く): 21485493

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 26821, 80463, 187747, 241389, 455957, 563241, 1367871, 1689723, 3191699, 4103613, 9575097, 28725291]

約数ペア:

[(1, 28725291), (3, 9575097), (7, 4103613), (9, 3191699), (17, 1689723), (21, 1367871), (51, 563241), (63, 455957), (119, 241389), (153, 187747), (357, 80463), (1071, 26821)]