21290571

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{631}}^1$

素因数の和:823

約数の個数: 24

約数和(自身を含む): 32338176

約数和(自身を除く): 11047605

約数列:

[1, 3, 9, 23, 69, 163, 207, 489, 631, 1467, 1893, 3749, 5679, 11247, 14513, 33741, 43539, 102853, 130617, 308559, 925677, 2365619, 7096857, 21290571]

約数ペア:

[(1, 21290571), (3, 7096857), (9, 2365619), (23, 925677), (69, 308559), (163, 130617), (207, 102853), (489, 43539), (631, 33741), (1467, 14513), (1893, 11247), (3749, 5679)]