20897823

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 9584097

約数列:

[1, 3, 23, 41, 69, 83, 89, 123, 249, 267, 943, 1909, 2047, 2829, 3403, 3649, 5727, 6141, 7387, 10209, 10947, 22161, 78269, 83927, 169901, 234807, 251781, 302867, 509703, 908601, 6965941, 20897823]

約数ペア:

[(1, 20897823), (3, 6965941), (23, 908601), (41, 509703), (69, 302867), (83, 251781), (89, 234807), (123, 169901), (249, 83927), (267, 78269), (943, 22161), (1909, 10947), (2047, 10209), (2829, 7387), (3403, 6141), (3649, 5727)]