21203721

素因数分解:

$3^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:112

約数の個数: 96

約数和(自身を含む): 42024960

約数和(自身を除く): 20821239

約数列:

[1, 3, 7, 9, 11, 21, 27, 31, 33, 47, 49, 63, 77, 93, 99, 141, 147, 189, 217, 231, 279, 297, 329, 341, 423, 441, 517, 539, 651, 693, 837, 987, 1023, 1269, 1323, 1457, 1519, 1551, 1617, 1953, 2079, 2303, 2387, 2961, 3069, 3619, 4371, 4557, 4653, 4851, 5859, 6909, 7161, 8883, 9207, 10199, 10857, 13113, 13671, 13959, 14553, 16027, 16709, 20727, 21483, 25333, 30597, 32571, 39339, 41013, 48081, 50127, 62181, 64449, 71393, 75999, 91791, 97713, 112189, 144243, 150381, 214179, 227997, 275373, 336567, 432729, 451143, 642537, 683991, 785323, 1009701, 1927611, 2355969, 3029103, 7067907, 21203721]

約数ペア:

[(1, 21203721), (3, 7067907), (7, 3029103), (9, 2355969), (11, 1927611), (21, 1009701), (27, 785323), (31, 683991), (33, 642537), (47, 451143), (49, 432729), (63, 336567), (77, 275373), (93, 227997), (99, 214179), (141, 150381), (147, 144243), (189, 112189), (217, 97713), (231, 91791), (279, 75999), (297, 71393), (329, 64449), (341, 62181), (423, 50127), (441, 48081), (517, 41013), (539, 39339), (651, 32571), (693, 30597), (837, 25333), (987, 21483), (1023, 20727), (1269, 16709), (1323, 16027), (1457, 14553), (1519, 13959), (1551, 13671), (1617, 13113), (1953, 10857), (2079, 10199), (2303, 9207), (2387, 8883), (2961, 7161), (3069, 6909), (3619, 5859), (4371, 4851), (4557, 4653)]