20965997185

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:559

約数の個数: 96

約数和(自身を含む): 31304931840

約数和(自身を除く): 10338934655

約数列:

[1, 5, 7, 23, 35, 41, 71, 115, 161, 205, 287, 355, 389, 497, 529, 805, 943, 1435, 1633, 1945, 2485, 2645, 2723, 2911, 3703, 4715, 6601, 8165, 8947, 11431, 13615, 14555, 15949, 18515, 20377, 21689, 27619, 33005, 37559, 44735, 57155, 62629, 66953, 79745, 101885, 108445, 111643, 138095, 151823, 187795, 193333, 205781, 262913, 313145, 334765, 366827, 468671, 558215, 635237, 759115, 966665, 1028905, 1132379, 1314565, 1440467, 1539919, 1834135, 2343355, 2567789, 3176185, 4446659, 5661895, 7202335, 7699595, 7926653, 8437021, 10779433, 12838945, 14610451, 22233295, 26044717, 39633265, 42185105, 53897165, 59059147, 73052255, 102273157, 130223585, 182313019, 295295735, 511365785, 599028491, 911565095, 2995142455, 4193199437, 20965997185]

約数ペア:

[(1, 20965997185), (5, 4193199437), (7, 2995142455), (23, 911565095), (35, 599028491), (41, 511365785), (71, 295295735), (115, 182313019), (161, 130223585), (205, 102273157), (287, 73052255), (355, 59059147), (389, 53897165), (497, 42185105), (529, 39633265), (805, 26044717), (943, 22233295), (1435, 14610451), (1633, 12838945), (1945, 10779433), (2485, 8437021), (2645, 7926653), (2723, 7699595), (2911, 7202335), (3703, 5661895), (4715, 4446659), (6601, 3176185), (8165, 2567789), (8947, 2343355), (11431, 1834135), (13615, 1539919), (14555, 1440467), (15949, 1314565), (18515, 1132379), (20377, 1028905), (21689, 966665), (27619, 759115), (33005, 635237), (37559, 558215), (44735, 468671), (57155, 366827), (62629, 334765), (66953, 313145), (79745, 262913), (101885, 205781), (108445, 193333), (111643, 187795), (138095, 151823)]