21561705

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1013}}^1$

素因数の和:1078

約数の個数: 48

約数和(自身を含む): 41760576

約数和(自身を除く): 20198871

約数列:

[1, 3, 5, 9, 11, 15, 33, 43, 45, 55, 99, 129, 165, 215, 387, 473, 495, 645, 1013, 1419, 1935, 2365, 3039, 4257, 5065, 7095, 9117, 11143, 15195, 21285, 33429, 43559, 45585, 55715, 100287, 130677, 167145, 217795, 392031, 479149, 501435, 653385, 1437447, 1960155, 2395745, 4312341, 7187235, 21561705]

約数ペア:

[(1, 21561705), (3, 7187235), (5, 4312341), (9, 2395745), (11, 1960155), (15, 1437447), (33, 653385), (43, 501435), (45, 479149), (55, 392031), (99, 217795), (129, 167145), (165, 130677), (215, 100287), (387, 55715), (473, 45585), (495, 43559), (645, 33429), (1013, 21285), (1419, 15195), (1935, 11143), (2365, 9117), (3039, 7095), (4257, 5065)]