21749385

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{233}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 40974336

約数和(自身を除く): 19224951

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 127, 147, 233, 245, 381, 635, 699, 735, 889, 1165, 1631, 1905, 2667, 3495, 4445, 4893, 6223, 8155, 11417, 13335, 18669, 24465, 29591, 31115, 34251, 57085, 88773, 93345, 147955, 171255, 207137, 443865, 621411, 1035685, 1449959, 3107055, 4349877, 7249795, 21749385]

約数ペア:

[(1, 21749385), (3, 7249795), (5, 4349877), (7, 3107055), (15, 1449959), (21, 1035685), (35, 621411), (49, 443865), (105, 207137), (127, 171255), (147, 147955), (233, 93345), (245, 88773), (381, 57085), (635, 34251), (699, 31115), (735, 29591), (889, 24465), (1165, 18669), (1631, 13335), (1905, 11417), (2667, 8155), (3495, 6223), (4445, 4893)]