31303280

素因数分解:

$2^4\times 5^1\times {\mathrm{391291}}^1$

素因数の和:391304

約数の個数: 20

約数和(自身を含む): 72780312

約数和(自身を除く): 41477032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 391291, 782582, 1565164, 1956455, 3130328, 3912910, 6260656, 7825820, 15651640, 31303280]

約数ペア:

[(1, 31303280), (2, 15651640), (4, 7825820), (5, 6260656), (8, 3912910), (10, 3130328), (16, 1956455), (20, 1565164), (40, 782582), (80, 391291)]