21780928

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:629

約数の個数: 56

約数和(自身を含む): 47621952

約数和(自身を除く): 25841024

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 47, 52, 64, 94, 104, 188, 208, 376, 416, 557, 611, 752, 832, 1114, 1222, 1504, 2228, 2444, 3008, 4456, 4888, 7241, 8912, 9776, 14482, 17824, 19552, 26179, 28964, 35648, 39104, 52358, 57928, 104716, 115856, 209432, 231712, 340327, 418864, 463424, 680654, 837728, 1361308, 1675456, 2722616, 5445232, 10890464, 21780928]

約数ペア:

[(1, 21780928), (2, 10890464), (4, 5445232), (8, 2722616), (13, 1675456), (16, 1361308), (26, 837728), (32, 680654), (47, 463424), (52, 418864), (64, 340327), (94, 231712), (104, 209432), (188, 115856), (208, 104716), (376, 57928), (416, 52358), (557, 39104), (611, 35648), (752, 28964), (832, 26179), (1114, 19552), (1222, 17824), (1504, 14482), (2228, 9776), (2444, 8912), (3008, 7241), (4456, 4888)]