20647965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5573}}^1$

素因数の和:5613

約数の個数: 32

約数和(自身を含む): 37457280

約数和(自身を除く): 16809315

約数列:

[1, 3, 5, 13, 15, 19, 39, 57, 65, 95, 195, 247, 285, 741, 1235, 3705, 5573, 16719, 27865, 72449, 83595, 105887, 217347, 317661, 362245, 529435, 1086735, 1376531, 1588305, 4129593, 6882655, 20647965]

約数ペア:

[(1, 20647965), (3, 6882655), (5, 4129593), (13, 1588305), (15, 1376531), (19, 1086735), (39, 529435), (57, 362245), (65, 317661), (95, 217347), (195, 105887), (247, 83595), (285, 72449), (741, 27865), (1235, 16719), (3705, 5573)]