21091328

素因数分解:

$2^{10}\times {\mathrm{43}}^1\times {\mathrm{479}}^1$

素因数の和:542

約数の個数: 44

約数和(自身を含む): 43232640

約数和(自身を除く): 22141312

約数列:

[1, 2, 4, 8, 16, 32, 43, 64, 86, 128, 172, 256, 344, 479, 512, 688, 958, 1024, 1376, 1916, 2752, 3832, 5504, 7664, 11008, 15328, 20597, 22016, 30656, 41194, 44032, 61312, 82388, 122624, 164776, 245248, 329552, 490496, 659104, 1318208, 2636416, 5272832, 10545664, 21091328]

約数ペア:

[(1, 21091328), (2, 10545664), (4, 5272832), (8, 2636416), (16, 1318208), (32, 659104), (43, 490496), (64, 329552), (86, 245248), (128, 164776), (172, 122624), (256, 82388), (344, 61312), (479, 44032), (512, 41194), (688, 30656), (958, 22016), (1024, 20597), (1376, 15328), (1916, 11008), (2752, 7664), (3832, 5504)]