19973385

素因数分解:

$3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{967}}^1$

素因数の和:1004

約数の個数: 48

約数和(自身を含む): 38054016

約数和(自身を除く): 18080631

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 243, 255, 405, 459, 765, 967, 1215, 1377, 2295, 2901, 4131, 4835, 6885, 8703, 14505, 16439, 20655, 26109, 43515, 49317, 78327, 82195, 130545, 147951, 234981, 246585, 391635, 443853, 739755, 1174905, 1331559, 2219265, 3994677, 6657795, 19973385]

約数ペア:

[(1, 19973385), (3, 6657795), (5, 3994677), (9, 2219265), (15, 1331559), (17, 1174905), (27, 739755), (45, 443853), (51, 391635), (81, 246585), (85, 234981), (135, 147951), (153, 130545), (243, 82195), (255, 78327), (405, 49317), (459, 43515), (765, 26109), (967, 20655), (1215, 16439), (1377, 14505), (2295, 8703), (2901, 6885), (4131, 4835)]