28138257

素因数分解:

$3^2\times 7^1\times {\mathrm{367}}^1\times {\mathrm{1217}}^1$

素因数の和:1597

約数の個数: 24

約数和(自身を含む): 46615296

約数和(自身を除く): 18477039

約数列:

[1, 3, 7, 9, 21, 63, 367, 1101, 1217, 2569, 3303, 3651, 7707, 8519, 10953, 23121, 25557, 76671, 446639, 1339917, 3126473, 4019751, 9379419, 28138257]

約数ペア:

[(1, 28138257), (3, 9379419), (7, 4019751), (9, 3126473), (21, 1339917), (63, 446639), (367, 76671), (1101, 25557), (1217, 23121), (2569, 10953), (3303, 8519), (3651, 7707)]