21218967

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{457}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 38867712

約数和(自身を除く): 17648745

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 67, 77, 99, 201, 231, 457, 469, 603, 693, 737, 1371, 1407, 2211, 3199, 4113, 4221, 5027, 5159, 6633, 9597, 15081, 15477, 28791, 30619, 35189, 45243, 46431, 91857, 105567, 214333, 275571, 316701, 336809, 642999, 1010427, 1928997, 2357663, 3031281, 7072989, 21218967]

約数ペア:

[(1, 21218967), (3, 7072989), (7, 3031281), (9, 2357663), (11, 1928997), (21, 1010427), (33, 642999), (63, 336809), (67, 316701), (77, 275571), (99, 214333), (201, 105567), (231, 91857), (457, 46431), (469, 45243), (603, 35189), (693, 30619), (737, 28791), (1371, 15477), (1407, 15081), (2211, 9597), (3199, 6633), (4113, 5159), (4221, 5027)]