19796985

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{787}}^1$

素因数の和:854

約数の個数: 48

約数和(自身を含む): 37861824

約数和(自身を除く): 18064839

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 117, 129, 195, 215, 387, 559, 585, 645, 787, 1677, 1935, 2361, 2795, 3935, 5031, 7083, 8385, 10231, 11805, 25155, 30693, 33841, 35415, 51155, 92079, 101523, 153465, 169205, 304569, 439933, 460395, 507615, 1319799, 1522845, 2199665, 3959397, 6598995, 19796985]

約数ペア:

[(1, 19796985), (3, 6598995), (5, 3959397), (9, 2199665), (13, 1522845), (15, 1319799), (39, 507615), (43, 460395), (45, 439933), (65, 304569), (117, 169205), (129, 153465), (195, 101523), (215, 92079), (387, 51155), (559, 35415), (585, 33841), (645, 30693), (787, 25155), (1677, 11805), (1935, 10231), (2361, 8385), (2795, 7083), (3935, 5031)]