21270208

素因数分解:

$2^6\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:245

約数の個数: 56

約数和(自身を含む): 44256960

約数和(自身を除く): 22986752

約数列:

[1, 2, 4, 8, 16, 32, 43, 59, 64, 86, 118, 131, 172, 236, 262, 344, 472, 524, 688, 944, 1048, 1376, 1888, 2096, 2537, 2752, 3776, 4192, 5074, 5633, 7729, 8384, 10148, 11266, 15458, 20296, 22532, 30916, 40592, 45064, 61832, 81184, 90128, 123664, 162368, 180256, 247328, 332347, 360512, 494656, 664694, 1329388, 2658776, 5317552, 10635104, 21270208]

約数ペア:

[(1, 21270208), (2, 10635104), (4, 5317552), (8, 2658776), (16, 1329388), (32, 664694), (43, 494656), (59, 360512), (64, 332347), (86, 247328), (118, 180256), (131, 162368), (172, 123664), (236, 90128), (262, 81184), (344, 61832), (472, 45064), (524, 40592), (688, 30916), (944, 22532), (1048, 20296), (1376, 15458), (1888, 11266), (2096, 10148), (2537, 8384), (2752, 7729), (3776, 5633), (4192, 5074)]