20571716

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 40981248

約数和(自身を除く): 20409532

約数列:

[1, 2, 4, 11, 22, 43, 44, 83, 86, 131, 166, 172, 262, 332, 473, 524, 913, 946, 1441, 1826, 1892, 2882, 3569, 3652, 5633, 5764, 7138, 10873, 11266, 14276, 21746, 22532, 39259, 43492, 61963, 78518, 119603, 123926, 157036, 239206, 247852, 467539, 478412, 935078, 1870156, 5142929, 10285858, 20571716]

約数ペア:

[(1, 20571716), (2, 10285858), (4, 5142929), (11, 1870156), (22, 935078), (43, 478412), (44, 467539), (83, 247852), (86, 239206), (131, 157036), (166, 123926), (172, 119603), (262, 78518), (332, 61963), (473, 43492), (524, 39259), (913, 22532), (946, 21746), (1441, 14276), (1826, 11266), (1892, 10873), (2882, 7138), (3569, 5764), (3652, 5633)]