21620235

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{337}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 43610112

約数和(自身を除く): 21989877

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 47, 65, 91, 105, 141, 195, 235, 273, 329, 337, 455, 611, 705, 987, 1011, 1365, 1645, 1685, 1833, 2359, 3055, 4277, 4381, 4935, 5055, 7077, 9165, 11795, 12831, 13143, 15839, 21385, 21905, 30667, 35385, 47517, 64155, 65715, 79195, 92001, 110873, 153335, 205907, 237585, 332619, 460005, 554365, 617721, 1029535, 1441349, 1663095, 3088605, 4324047, 7206745, 21620235]

約数ペア:

[(1, 21620235), (3, 7206745), (5, 4324047), (7, 3088605), (13, 1663095), (15, 1441349), (21, 1029535), (35, 617721), (39, 554365), (47, 460005), (65, 332619), (91, 237585), (105, 205907), (141, 153335), (195, 110873), (235, 92001), (273, 79195), (329, 65715), (337, 64155), (455, 47517), (611, 35385), (705, 30667), (987, 21905), (1011, 21385), (1365, 15839), (1645, 13143), (1685, 12831), (1833, 11795), (2359, 9165), (3055, 7077), (4277, 5055), (4381, 4935)]