21036561

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{307}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 34771968

約数和(自身を除く): 13735407

約数列:

[1, 3, 7, 13, 21, 39, 91, 251, 273, 307, 753, 921, 1757, 2149, 3263, 3991, 5271, 6447, 9789, 11973, 22841, 27937, 68523, 77057, 83811, 231171, 539399, 1001741, 1618197, 3005223, 7012187, 21036561]

約数ペア:

[(1, 21036561), (3, 7012187), (7, 3005223), (13, 1618197), (21, 1001741), (39, 539399), (91, 231171), (251, 83811), (273, 77057), (307, 68523), (753, 27937), (921, 22841), (1757, 11973), (2149, 9789), (3263, 6447), (3991, 5271)]