20123999985

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{78917647}}^1$

素因数の和:78917672

約数の個数: 16

約数和(自身を含む): 34092423936

約数和(自身を除く): 13968423951

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 78917647, 236752941, 394588235, 1183764705, 1341599999, 4024799997, 6707999995, 20123999985]

約数ペア:

[(1, 20123999985), (3, 6707999995), (5, 4024799997), (15, 1341599999), (17, 1183764705), (51, 394588235), (85, 236752941), (255, 78917647)]