21267928

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 44432640

約数和(自身を除く): 23164712

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 121, 127, 173, 242, 254, 346, 484, 508, 692, 968, 1016, 1384, 1397, 1903, 2794, 3806, 5588, 7612, 11176, 15224, 15367, 20933, 21971, 30734, 41866, 43942, 61468, 83732, 87884, 122936, 167464, 175768, 241681, 483362, 966724, 1933448, 2658491, 5316982, 10633964, 21267928]

約数ペア:

[(1, 21267928), (2, 10633964), (4, 5316982), (8, 2658491), (11, 1933448), (22, 966724), (44, 483362), (88, 241681), (121, 175768), (127, 167464), (173, 122936), (242, 87884), (254, 83732), (346, 61468), (484, 43942), (508, 41866), (692, 30734), (968, 21971), (1016, 20933), (1384, 15367), (1397, 15224), (1903, 11176), (2794, 7612), (3806, 5588)]