21505492

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:376

約数の個数: 36

約数和(自身を含む): 40613076

約数和(自身を除く): 19107584

約数列:

[1, 2, 4, 19, 38, 53, 76, 106, 212, 281, 361, 562, 722, 1007, 1124, 1444, 2014, 4028, 5339, 10678, 14893, 19133, 21356, 29786, 38266, 59572, 76532, 101441, 202882, 282967, 405764, 565934, 1131868, 5376373, 10752746, 21505492]

約数ペア:

[(1, 21505492), (2, 10752746), (4, 5376373), (19, 1131868), (38, 565934), (53, 405764), (76, 282967), (106, 202882), (212, 101441), (281, 76532), (361, 59572), (562, 38266), (722, 29786), (1007, 21356), (1124, 19133), (1444, 14893), (2014, 10678), (4028, 5339)]