21125973

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 32182272

約数和(自身を除く): 11056299

約数列:

[1, 3, 11, 31, 33, 93, 107, 193, 321, 341, 579, 1023, 1177, 2123, 3317, 3531, 5983, 6369, 9951, 17949, 20651, 36487, 61953, 65813, 109461, 197439, 227161, 640181, 681483, 1920543, 7041991, 21125973]

約数ペア:

[(1, 21125973), (3, 7041991), (11, 1920543), (31, 681483), (33, 640181), (93, 227161), (107, 197439), (193, 109461), (321, 65813), (341, 61953), (579, 36487), (1023, 20651), (1177, 17949), (2123, 9951), (3317, 6369), (3531, 5983)]