21183981

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{127}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 35979264

約数和(自身を除く): 14795283

約数列:

[1, 3, 7, 13, 21, 39, 47, 91, 127, 141, 169, 273, 329, 381, 507, 611, 889, 987, 1183, 1651, 1833, 2667, 3549, 4277, 4953, 5969, 7943, 11557, 12831, 17907, 21463, 23829, 34671, 41783, 55601, 64389, 77597, 125349, 150241, 166803, 232791, 450723, 543179, 1008761, 1629537, 3026283, 7061327, 21183981]

約数ペア:

[(1, 21183981), (3, 7061327), (7, 3026283), (13, 1629537), (21, 1008761), (39, 543179), (47, 450723), (91, 232791), (127, 166803), (141, 150241), (169, 125349), (273, 77597), (329, 64389), (381, 55601), (507, 41783), (611, 34671), (889, 23829), (987, 21463), (1183, 17907), (1651, 12831), (1833, 11557), (2667, 7943), (3549, 5969), (4277, 4953)]