20290257

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{2141}}^1$

素因数の和:2172

約数の個数: 28

約数和(自身を含む): 32776884

約数和(自身を除く): 12486627

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 729, 1053, 2141, 3159, 6423, 9477, 19269, 27833, 57807, 83499, 173421, 250497, 520263, 751491, 1560789, 2254473, 6763419, 20290257]

約数ペア:

[(1, 20290257), (3, 6763419), (9, 2254473), (13, 1560789), (27, 751491), (39, 520263), (81, 250497), (117, 173421), (243, 83499), (351, 57807), (729, 27833), (1053, 19269), (2141, 9477), (3159, 6423)]