21754755

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{619}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 41783040

約数和(自身を除く): 20028285

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 71, 99, 165, 213, 355, 495, 619, 639, 781, 1065, 1857, 2343, 3095, 3195, 3905, 5571, 6809, 7029, 9285, 11715, 20427, 27855, 34045, 35145, 43949, 61281, 102135, 131847, 219745, 306405, 395541, 483439, 659235, 1450317, 1977705, 2417195, 4350951, 7251585, 21754755]

約数ペア:

[(1, 21754755), (3, 7251585), (5, 4350951), (9, 2417195), (11, 1977705), (15, 1450317), (33, 659235), (45, 483439), (55, 395541), (71, 306405), (99, 219745), (165, 131847), (213, 102135), (355, 61281), (495, 43949), (619, 35145), (639, 34045), (781, 27855), (1065, 20427), (1857, 11715), (2343, 9285), (3095, 7029), (3195, 6809), (3905, 5571)]