21890154

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{823}}^1$

素因数の和:883

約数の個数: 64

約数和(自身を含む): 53157888

約数和(自身を除く): 31267734

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 31, 33, 39, 62, 66, 78, 93, 143, 186, 286, 341, 403, 429, 682, 806, 823, 858, 1023, 1209, 1646, 2046, 2418, 2469, 4433, 4938, 8866, 9053, 10699, 13299, 18106, 21398, 25513, 26598, 27159, 32097, 51026, 54318, 64194, 76539, 117689, 153078, 235378, 280643, 331669, 353067, 561286, 663338, 706134, 841929, 995007, 1683858, 1990014, 3648359, 7296718, 10945077, 21890154]

約数ペア:

[(1, 21890154), (2, 10945077), (3, 7296718), (6, 3648359), (11, 1990014), (13, 1683858), (22, 995007), (26, 841929), (31, 706134), (33, 663338), (39, 561286), (62, 353067), (66, 331669), (78, 280643), (93, 235378), (143, 153078), (186, 117689), (286, 76539), (341, 64194), (403, 54318), (429, 51026), (682, 32097), (806, 27159), (823, 26598), (858, 25513), (1023, 21398), (1209, 18106), (1646, 13299), (2046, 10699), (2418, 9053), (2469, 8866), (4433, 4938)]