20556081

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1321}}^1$

素因数の和:1366

約数の個数: 48

約数和(自身を含む): 38496640

約数和(自身を除く): 17940559

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 57, 63, 91, 117, 133, 171, 247, 273, 399, 741, 819, 1197, 1321, 1729, 2223, 3963, 5187, 9247, 11889, 15561, 17173, 25099, 27741, 51519, 75297, 83223, 120211, 154557, 175693, 225891, 326287, 360633, 527079, 978861, 1081899, 1581237, 2284009, 2936583, 6852027, 20556081]

約数ペア:

[(1, 20556081), (3, 6852027), (7, 2936583), (9, 2284009), (13, 1581237), (19, 1081899), (21, 978861), (39, 527079), (57, 360633), (63, 326287), (91, 225891), (117, 175693), (133, 154557), (171, 120211), (247, 83223), (273, 75297), (399, 51519), (741, 27741), (819, 25099), (1197, 17173), (1321, 15561), (1729, 11889), (2223, 9247), (3963, 5187)]