21161889

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19759}}^1$

素因数の和:19789

約数の個数: 24

約数和(自身を含む): 36990720

約数和(自身を除く): 15828831

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19759, 59277, 138313, 177831, 335903, 414939, 1007709, 1244817, 2351321, 3023127, 7053963, 21161889]

約数ペア:

[(1, 21161889), (3, 7053963), (7, 3023127), (9, 2351321), (17, 1244817), (21, 1007709), (51, 414939), (63, 335903), (119, 177831), (153, 138313), (357, 59277), (1071, 19759)]