20878521

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{5581}}^1$

素因数の和:5656

約数の個数: 16

約数和(自身を含む): 29472960

約数和(自身を除く): 8594439

約数列:

[1, 3, 29, 43, 87, 129, 1247, 3741, 5581, 16743, 161849, 239983, 485547, 719949, 6959507, 20878521]

約数ペア:

[(1, 20878521), (3, 6959507), (29, 719949), (43, 485547), (87, 239983), (129, 161849), (1247, 16743), (3741, 5581)]