20985315

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{4679}}^1$

素因数の和:4723

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 16754205

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 299, 345, 897, 1495, 4485, 4679, 14037, 23395, 60827, 70185, 107617, 182481, 304135, 322851, 538085, 912405, 1399021, 1614255, 4197063, 6995105, 20985315]

約数ペア:

[(1, 20985315), (3, 6995105), (5, 4197063), (13, 1614255), (15, 1399021), (23, 912405), (39, 538085), (65, 322851), (69, 304135), (115, 182481), (195, 107617), (299, 70185), (345, 60827), (897, 23395), (1495, 14037), (4485, 4679)]