21131901

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{6577}}^1$

素因数の和:6610

約数の個数: 32

約数和(自身を含む): 37889280

約数和(自身を除く): 16757379

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 119, 153, 189, 357, 459, 1071, 3213, 6577, 19731, 46039, 59193, 111809, 138117, 177579, 335427, 414351, 782663, 1006281, 1243053, 2347989, 3018843, 7043967, 21131901]

約数ペア:

[(1, 21131901), (3, 7043967), (7, 3018843), (9, 2347989), (17, 1243053), (21, 1006281), (27, 782663), (51, 414351), (63, 335427), (119, 177579), (153, 138117), (189, 111809), (357, 59193), (459, 46039), (1071, 19731), (3213, 6577)]