18978978

素因数分解:

$2^1\times 3^1\times {\mathrm{73}}^1\times {\mathrm{43331}}^1$

素因数の和:43409

約数の個数: 16

約数和(自身を含む): 38478816

約数和(自身を除く): 19499838

約数列:

[1, 2, 3, 6, 73, 146, 219, 438, 43331, 86662, 129993, 259986, 3163163, 6326326, 9489489, 18978978]

約数ペア:

[(1, 18978978), (2, 9489489), (3, 6326326), (6, 3163163), (73, 259986), (146, 129993), (219, 86662), (438, 43331)]