20701317

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{307}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 36072960

約数和(自身を除く): 15371643

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 169, 247, 273, 307, 399, 507, 741, 921, 1183, 1729, 2149, 3211, 3549, 3991, 5187, 5833, 6447, 9633, 11973, 17499, 22477, 27937, 40831, 51883, 67431, 75829, 83811, 122493, 155649, 227487, 363181, 530803, 985777, 1089543, 1592409, 2957331, 6900439, 20701317]

約数ペア:

[(1, 20701317), (3, 6900439), (7, 2957331), (13, 1592409), (19, 1089543), (21, 985777), (39, 530803), (57, 363181), (91, 227487), (133, 155649), (169, 122493), (247, 83811), (273, 75829), (307, 67431), (399, 51883), (507, 40831), (741, 27937), (921, 22477), (1183, 17499), (1729, 11973), (2149, 9633), (3211, 6447), (3549, 5833), (3991, 5187)]