20804455

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 29952000

約数和(自身を除く): 9147545

約数列:

[1, 5, 7, 29, 35, 103, 145, 199, 203, 515, 721, 995, 1015, 1393, 2987, 3605, 5771, 6965, 14935, 20497, 20909, 28855, 40397, 102485, 104545, 143479, 201985, 594413, 717395, 2972065, 4160891, 20804455]

約数ペア:

[(1, 20804455), (5, 4160891), (7, 2972065), (29, 717395), (35, 594413), (103, 201985), (145, 143479), (199, 104545), (203, 102485), (515, 40397), (721, 28855), (995, 20909), (1015, 20497), (1393, 14935), (2987, 6965), (3605, 5771)]