20868939

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{307}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 37669632

約数和(自身を除く): 16800693

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 83, 91, 117, 249, 273, 307, 581, 747, 819, 921, 1079, 1743, 2149, 2763, 3237, 3991, 5229, 6447, 7553, 9711, 11973, 19341, 22659, 25481, 27937, 35919, 67977, 76443, 83811, 178367, 229329, 251433, 331253, 535101, 993759, 1605303, 2318771, 2981277, 6956313, 20868939]

約数ペア:

[(1, 20868939), (3, 6956313), (7, 2981277), (9, 2318771), (13, 1605303), (21, 993759), (39, 535101), (63, 331253), (83, 251433), (91, 229329), (117, 178367), (249, 83811), (273, 76443), (307, 67977), (581, 35919), (747, 27937), (819, 25481), (921, 22659), (1079, 19341), (1743, 11973), (2149, 9711), (2763, 7553), (3237, 6447), (3991, 5229)]