21580754

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:354

約数の個数: 32

約数和(自身を含む): 36220800

約数和(自身を除く): 14640046

約数列:

[1, 2, 13, 26, 43, 86, 97, 194, 199, 398, 559, 1118, 1261, 2522, 2587, 4171, 5174, 8342, 8557, 17114, 19303, 38606, 54223, 108446, 111241, 222482, 250939, 501878, 830029, 1660058, 10790377, 21580754]

約数ペア:

[(1, 21580754), (2, 10790377), (13, 1660058), (26, 830029), (43, 501878), (86, 250939), (97, 222482), (194, 111241), (199, 108446), (398, 54223), (559, 38606), (1118, 19303), (1261, 17114), (2522, 8557), (2587, 8342), (4171, 5174)]