21389312

素因数分解:

$2^{13}\times 7^1\times {\mathrm{373}}^1$

素因数の和:406

約数の個数: 56

約数和(自身を含む): 49017936

約数和(自身を除く): 27628624

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 373, 448, 512, 746, 896, 1024, 1492, 1792, 2048, 2611, 2984, 3584, 4096, 5222, 5968, 7168, 8192, 10444, 11936, 14336, 20888, 23872, 28672, 41776, 47744, 57344, 83552, 95488, 167104, 190976, 334208, 381952, 668416, 763904, 1336832, 1527808, 2673664, 3055616, 5347328, 10694656, 21389312]

約数ペア:

[(1, 21389312), (2, 10694656), (4, 5347328), (7, 3055616), (8, 2673664), (14, 1527808), (16, 1336832), (28, 763904), (32, 668416), (56, 381952), (64, 334208), (112, 190976), (128, 167104), (224, 95488), (256, 83552), (373, 57344), (448, 47744), (512, 41776), (746, 28672), (896, 23872), (1024, 20888), (1492, 14336), (1792, 11936), (2048, 10444), (2611, 8192), (2984, 7168), (3584, 5968), (4096, 5222)]