215089721

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 288148224

約数和(自身を除く): 73058503

約数列:

[1, 7, 11, 23, 61, 77, 121, 161, 181, 253, 427, 671, 847, 1267, 1403, 1771, 1991, 2783, 4163, 4697, 7381, 9821, 11041, 13937, 15433, 19481, 21901, 29141, 45793, 51667, 77287, 108031, 121451, 153307, 169763, 253943, 320551, 503723, 850157, 1188341, 1335961, 1777601, 2793373, 3526061, 9351727, 19553611, 30727103, 215089721]

約数ペア:

[(1, 215089721), (7, 30727103), (11, 19553611), (23, 9351727), (61, 3526061), (77, 2793373), (121, 1777601), (161, 1335961), (181, 1188341), (253, 850157), (427, 503723), (671, 320551), (847, 253943), (1267, 169763), (1403, 153307), (1771, 121451), (1991, 108031), (2783, 77287), (4163, 51667), (4697, 45793), (7381, 29141), (9821, 21901), (11041, 19481), (13937, 15433)]