21247744

素因数分解:

$2^8\times 7^1\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:261

約数の個数: 72

約数和(自身を含む): 49448448

約数和(自身を除く): 28200704

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 71, 112, 128, 142, 167, 224, 256, 284, 334, 448, 497, 568, 668, 896, 994, 1136, 1169, 1336, 1792, 1988, 2272, 2338, 2672, 3976, 4544, 4676, 5344, 7952, 9088, 9352, 10688, 11857, 15904, 18176, 18704, 21376, 23714, 31808, 37408, 42752, 47428, 63616, 74816, 82999, 94856, 127232, 149632, 165998, 189712, 299264, 331996, 379424, 663992, 758848, 1327984, 1517696, 2655968, 3035392, 5311936, 10623872, 21247744]

約数ペア:

[(1, 21247744), (2, 10623872), (4, 5311936), (7, 3035392), (8, 2655968), (14, 1517696), (16, 1327984), (28, 758848), (32, 663992), (56, 379424), (64, 331996), (71, 299264), (112, 189712), (128, 165998), (142, 149632), (167, 127232), (224, 94856), (256, 82999), (284, 74816), (334, 63616), (448, 47428), (497, 42752), (568, 37408), (668, 31808), (896, 23714), (994, 21376), (1136, 18704), (1169, 18176), (1336, 15904), (1792, 11857), (1988, 10688), (2272, 9352), (2338, 9088), (2672, 7952), (3976, 5344), (4544, 4676)]