20778039

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{587}}^1$

素因数の和:641

約数の個数: 40

約数和(自身を含む): 34151040

約数和(自身を除く): 13373001

約数列:

[1, 3, 9, 19, 23, 27, 57, 69, 81, 171, 207, 437, 513, 587, 621, 1311, 1539, 1761, 1863, 3933, 5283, 11153, 11799, 13501, 15849, 33459, 35397, 40503, 47547, 100377, 121509, 256519, 301131, 364527, 769557, 903393, 1093581, 2308671, 6926013, 20778039]

約数ペア:

[(1, 20778039), (3, 6926013), (9, 2308671), (19, 1093581), (23, 903393), (27, 769557), (57, 364527), (69, 301131), (81, 256519), (171, 121509), (207, 100377), (437, 47547), (513, 40503), (587, 35397), (621, 33459), (1311, 15849), (1539, 13501), (1761, 11799), (1863, 11153), (3933, 5283)]