21172473

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 37180416

約数和(自身を除く): 16007943

約数列:

[1, 3, 7, 9, 21, 31, 37, 63, 93, 111, 217, 259, 279, 293, 333, 651, 777, 879, 1147, 1953, 2051, 2331, 2637, 3441, 6153, 8029, 9083, 10323, 10841, 18459, 24087, 27249, 32523, 63581, 72261, 75887, 81747, 97569, 190743, 227661, 336071, 572229, 682983, 1008213, 2352497, 3024639, 7057491, 21172473]

約数ペア:

[(1, 21172473), (3, 7057491), (7, 3024639), (9, 2352497), (21, 1008213), (31, 682983), (37, 572229), (63, 336071), (93, 227661), (111, 190743), (217, 97569), (259, 81747), (279, 75887), (293, 72261), (333, 63581), (651, 32523), (777, 27249), (879, 24087), (1147, 18459), (1953, 10841), (2051, 10323), (2331, 9083), (2637, 8029), (3441, 6153)]