18978686

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{2131}}^1$

素因数の和:2267

約数の個数: 16

約数和(自身を含む): 29344848

約数和(自身を除く): 10366162

約数列:

[1, 2, 61, 73, 122, 146, 2131, 4262, 4453, 8906, 129991, 155563, 259982, 311126, 9489343, 18978686]

約数ペア:

[(1, 18978686), (2, 9489343), (61, 311126), (73, 259982), (122, 155563), (146, 129991), (2131, 8906), (4262, 4453)]