20819985

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{81647}}^1$

素因数の和:81672

約数の個数: 16

約数和(自身を含む): 35271936

約数和(自身を除く): 14451951

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 81647, 244941, 408235, 1224705, 1387999, 4163997, 6939995, 20819985]

約数ペア:

[(1, 20819985), (3, 6939995), (5, 4163997), (15, 1387999), (17, 1224705), (51, 408235), (85, 244941), (255, 81647)]