19799955

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{263}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 19736685

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 239, 263, 315, 717, 789, 1195, 1315, 1673, 1841, 2151, 2367, 3585, 3945, 5019, 5523, 8365, 9205, 10755, 11835, 15057, 16569, 25095, 27615, 62857, 75285, 82845, 188571, 314285, 439999, 565713, 942855, 1319997, 2199995, 2828565, 3959991, 6599985, 19799955]

約数ペア:

[(1, 19799955), (3, 6599985), (5, 3959991), (7, 2828565), (9, 2199995), (15, 1319997), (21, 942855), (35, 565713), (45, 439999), (63, 314285), (105, 188571), (239, 82845), (263, 75285), (315, 62857), (717, 27615), (789, 25095), (1195, 16569), (1315, 15057), (1673, 11835), (1841, 10755), (2151, 9205), (2367, 8365), (3585, 5523), (3945, 5019)]