20538441

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 39726720

約数和(自身を除く): 19188279

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 37, 63, 77, 81, 89, 99, 111, 189, 231, 259, 267, 297, 333, 407, 567, 623, 693, 777, 801, 891, 979, 999, 1221, 1869, 2079, 2331, 2403, 2849, 2937, 2997, 3293, 3663, 5607, 6237, 6853, 6993, 7209, 8547, 8811, 9879, 10989, 16821, 20559, 20979, 23051, 25641, 26433, 29637, 32967, 36223, 50463, 61677, 69153, 76923, 79299, 88911, 108669, 185031, 207459, 230769, 253561, 266733, 326007, 555093, 622377, 760683, 978021, 1867131, 2282049, 2934063, 6846147, 20538441]

約数ペア:

[(1, 20538441), (3, 6846147), (7, 2934063), (9, 2282049), (11, 1867131), (21, 978021), (27, 760683), (33, 622377), (37, 555093), (63, 326007), (77, 266733), (81, 253561), (89, 230769), (99, 207459), (111, 185031), (189, 108669), (231, 88911), (259, 79299), (267, 76923), (297, 69153), (333, 61677), (407, 50463), (567, 36223), (623, 32967), (693, 29637), (777, 26433), (801, 25641), (891, 23051), (979, 20979), (999, 20559), (1221, 16821), (1869, 10989), (2079, 9879), (2331, 8811), (2403, 8547), (2849, 7209), (2937, 6993), (2997, 6853), (3293, 6237), (3663, 5607)]