21020692

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{491}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 46287360

約数和(自身を除く): 25266668

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 139, 154, 278, 308, 491, 556, 973, 982, 1529, 1946, 1964, 3058, 3437, 3892, 5401, 6116, 6874, 10703, 10802, 13748, 21406, 21604, 37807, 42812, 68249, 75614, 136498, 151228, 272996, 477743, 750739, 955486, 1501478, 1910972, 3002956, 5255173, 10510346, 21020692]

約数ペア:

[(1, 21020692), (2, 10510346), (4, 5255173), (7, 3002956), (11, 1910972), (14, 1501478), (22, 955486), (28, 750739), (44, 477743), (77, 272996), (139, 151228), (154, 136498), (278, 75614), (308, 68249), (491, 42812), (556, 37807), (973, 21604), (982, 21406), (1529, 13748), (1946, 10802), (1964, 10703), (3058, 6874), (3437, 6116), (3892, 5401)]