20557791

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{5227}}^1$

素因数の和:5275

約数の個数: 24

約数和(自身を含む): 32622720

約数和(自身を除く): 12064929

約数列:

[1, 3, 9, 19, 23, 57, 69, 171, 207, 437, 1311, 3933, 5227, 15681, 47043, 99313, 120221, 297939, 360663, 893817, 1081989, 2284199, 6852597, 20557791]

約数ペア:

[(1, 20557791), (3, 6852597), (9, 2284199), (19, 1081989), (23, 893817), (57, 360663), (69, 297939), (171, 120221), (207, 99313), (437, 47043), (1311, 15681), (3933, 5227)]