28189791

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{26321}}^1$

素因数の和:26351

約数の個数: 24

約数和(自身を含む): 49274784

約数和(自身を除く): 21084993

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 26321, 78963, 184247, 236889, 447457, 552741, 1342371, 1658223, 3132199, 4027113, 9396597, 28189791]

約数ペア:

[(1, 28189791), (3, 9396597), (7, 4027113), (9, 3132199), (17, 1658223), (21, 1342371), (51, 552741), (63, 447457), (119, 236889), (153, 184247), (357, 78963), (1071, 26321)]