20705685

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:243

約数の個数: 96

約数和(自身を含む): 45505152

約数和(自身を除く): 24799467

約数列:

[1, 3, 5, 7, 11, 13, 15, 21, 33, 35, 39, 49, 55, 65, 77, 91, 105, 143, 147, 165, 195, 197, 231, 245, 273, 385, 429, 455, 539, 591, 637, 715, 735, 985, 1001, 1155, 1365, 1379, 1617, 1911, 2145, 2167, 2561, 2695, 2955, 3003, 3185, 4137, 5005, 6501, 6895, 7007, 7683, 8085, 9555, 9653, 10835, 12805, 15015, 15169, 17927, 20685, 21021, 28171, 28959, 32505, 35035, 38415, 45507, 48265, 53781, 75845, 84513, 89635, 105105, 106183, 125489, 140855, 144795, 197197, 227535, 268905, 318549, 376467, 422565, 530915, 591591, 627445, 985985, 1380379, 1592745, 1882335, 2957955, 4141137, 6901895, 20705685]

約数ペア:

[(1, 20705685), (3, 6901895), (5, 4141137), (7, 2957955), (11, 1882335), (13, 1592745), (15, 1380379), (21, 985985), (33, 627445), (35, 591591), (39, 530915), (49, 422565), (55, 376467), (65, 318549), (77, 268905), (91, 227535), (105, 197197), (143, 144795), (147, 140855), (165, 125489), (195, 106183), (197, 105105), (231, 89635), (245, 84513), (273, 75845), (385, 53781), (429, 48265), (455, 45507), (539, 38415), (591, 35035), (637, 32505), (715, 28959), (735, 28171), (985, 21021), (1001, 20685), (1155, 17927), (1365, 15169), (1379, 15015), (1617, 12805), (1911, 10835), (2145, 9653), (2167, 9555), (2561, 8085), (2695, 7683), (2955, 7007), (3003, 6895), (3185, 6501), (4137, 5005)]