20816965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10331}}^1$

素因数の和:10380

約数の個数: 16

約数和(自身を含む): 27772416

約数和(自身を除く): 6955451

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10331, 51655, 134303, 320261, 671515, 1601305, 4163393, 20816965]

約数ペア:

[(1, 20816965), (5, 4163393), (13, 1601305), (31, 671515), (65, 320261), (155, 134303), (403, 51655), (2015, 10331)]