21149955

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27647}}^1$

素因数の和:27675

約数の個数: 24

約数和(自身を含む): 38817792

約数和(自身を除く): 17667837

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27647, 82941, 138235, 248823, 414705, 469999, 1244115, 1409997, 2349995, 4229991, 7049985, 21149955]

約数ペア:

[(1, 21149955), (3, 7049985), (5, 4229991), (9, 2349995), (15, 1409997), (17, 1244115), (45, 469999), (51, 414705), (85, 248823), (153, 138235), (255, 82941), (765, 27647)]