21559383

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 35212320

約数和(自身を除く): 13652937

約数列:

[1, 3, 9, 17, 29, 43, 51, 87, 113, 129, 153, 261, 339, 387, 493, 731, 1017, 1247, 1479, 1921, 2193, 3277, 3741, 4437, 4859, 5763, 6579, 9831, 11223, 14577, 17289, 21199, 29493, 43731, 55709, 63597, 82603, 140911, 167127, 190791, 247809, 422733, 501381, 743427, 1268199, 2395487, 7186461, 21559383]

約数ペア:

[(1, 21559383), (3, 7186461), (9, 2395487), (17, 1268199), (29, 743427), (43, 501381), (51, 422733), (87, 247809), (113, 190791), (129, 167127), (153, 140911), (261, 82603), (339, 63597), (387, 55709), (493, 43731), (731, 29493), (1017, 21199), (1247, 17289), (1479, 14577), (1921, 11223), (2193, 9831), (3277, 6579), (3741, 5763), (4437, 4859)]