21312256

素因数分解:

$2^8\times 7^2\times {\mathrm{1699}}^1$

素因数の和:1729

約数の個数: 54

約数和(自身を含む): 49515900

約数和(自身を除く): 28203644

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 128, 196, 224, 256, 392, 448, 784, 896, 1568, 1699, 1792, 3136, 3398, 6272, 6796, 11893, 12544, 13592, 23786, 27184, 47572, 54368, 83251, 95144, 108736, 166502, 190288, 217472, 333004, 380576, 434944, 666008, 761152, 1332016, 1522304, 2664032, 3044608, 5328064, 10656128, 21312256]

約数ペア:

[(1, 21312256), (2, 10656128), (4, 5328064), (7, 3044608), (8, 2664032), (14, 1522304), (16, 1332016), (28, 761152), (32, 666008), (49, 434944), (56, 380576), (64, 333004), (98, 217472), (112, 190288), (128, 166502), (196, 108736), (224, 95144), (256, 83251), (392, 54368), (448, 47572), (784, 27184), (896, 23786), (1568, 13592), (1699, 12544), (1792, 11893), (3136, 6796), (3398, 6272)]