19929855

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^2$

素因数の和:168

約数の個数: 48

約数和(自身を含む): 36279936

約数和(自身を除く): 16350081

約数列:

[1, 3, 5, 11, 15, 33, 43, 53, 55, 129, 159, 165, 215, 265, 473, 583, 645, 795, 1419, 1749, 2279, 2365, 2809, 2915, 6837, 7095, 8427, 8745, 11395, 14045, 25069, 30899, 34185, 42135, 75207, 92697, 120787, 125345, 154495, 362361, 376035, 463485, 603935, 1328657, 1811805, 3985971, 6643285, 19929855]

約数ペア:

[(1, 19929855), (3, 6643285), (5, 3985971), (11, 1811805), (15, 1328657), (33, 603935), (43, 463485), (53, 376035), (55, 362361), (129, 154495), (159, 125345), (165, 120787), (215, 92697), (265, 75207), (473, 42135), (583, 34185), (645, 30899), (795, 25069), (1419, 14045), (1749, 11395), (2279, 8745), (2365, 8427), (2809, 7095), (2915, 6837)]