20748416

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{337}}^1$

素因数の和:401

約数の個数: 64

約数和(自身を含む): 45853080

約数和(自身を除く): 25104664

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 37, 52, 64, 74, 104, 128, 148, 208, 296, 337, 416, 481, 592, 674, 832, 962, 1184, 1348, 1664, 1924, 2368, 2696, 3848, 4381, 4736, 5392, 7696, 8762, 10784, 12469, 15392, 17524, 21568, 24938, 30784, 35048, 43136, 49876, 61568, 70096, 99752, 140192, 162097, 199504, 280384, 324194, 399008, 560768, 648388, 798016, 1296776, 1596032, 2593552, 5187104, 10374208, 20748416]

約数ペア:

[(1, 20748416), (2, 10374208), (4, 5187104), (8, 2593552), (13, 1596032), (16, 1296776), (26, 798016), (32, 648388), (37, 560768), (52, 399008), (64, 324194), (74, 280384), (104, 199504), (128, 162097), (148, 140192), (208, 99752), (296, 70096), (337, 61568), (416, 49876), (481, 43136), (592, 35048), (674, 30784), (832, 24938), (962, 21568), (1184, 17524), (1348, 15392), (1664, 12469), (1924, 10784), (2368, 8762), (2696, 7696), (3848, 5392), (4381, 4736)]