21090135381

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1\times {\mathrm{73483}}^1$

素因数の和:73745

約数の個数: 32

約数和(自身を含む): 32732712960

約数和(自身を除く): 11642577579

約数列:

[1, 3, 7, 21, 79, 173, 237, 519, 553, 1211, 1659, 3633, 13667, 41001, 73483, 95669, 220449, 287007, 514381, 1543143, 5805157, 12712559, 17415471, 38137677, 40636099, 88987913, 121908297, 266963739, 1004292161, 3012876483, 7030045127, 21090135381]

約数ペア:

[(1, 21090135381), (3, 7030045127), (7, 3012876483), (21, 1004292161), (79, 266963739), (173, 121908297), (237, 88987913), (519, 40636099), (553, 38137677), (1211, 17415471), (1659, 12712559), (3633, 5805157), (13667, 1543143), (41001, 514381), (73483, 287007), (95669, 220449)]