18717321

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 10893687

約数列:

[1, 3, 7, 21, 53, 67, 159, 201, 251, 371, 469, 753, 1113, 1407, 1757, 3551, 5271, 10653, 13303, 16817, 24857, 39909, 50451, 74571, 93121, 117719, 279363, 353157, 891301, 2673903, 6239107, 18717321]

約数ペア:

[(1, 18717321), (3, 6239107), (7, 2673903), (21, 891301), (53, 353157), (67, 279363), (159, 117719), (201, 93121), (251, 74571), (371, 50451), (469, 39909), (753, 24857), (1113, 16817), (1407, 13303), (1757, 10653), (3551, 5271)]