21574785

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:178

約数の個数: 64

約数和(自身を含む): 39640320

約数和(自身を除く): 18065535

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 61, 73, 85, 95, 183, 219, 255, 285, 305, 323, 365, 915, 969, 1037, 1095, 1159, 1241, 1387, 1615, 3111, 3477, 3723, 4161, 4453, 4845, 5185, 5795, 6205, 6935, 13359, 15555, 17385, 18615, 19703, 20805, 22265, 23579, 59109, 66795, 70737, 75701, 84607, 98515, 117895, 227103, 253821, 295545, 353685, 378505, 423035, 1135515, 1269105, 1438319, 4314957, 7191595, 21574785]

約数ペア:

[(1, 21574785), (3, 7191595), (5, 4314957), (15, 1438319), (17, 1269105), (19, 1135515), (51, 423035), (57, 378505), (61, 353685), (73, 295545), (85, 253821), (95, 227103), (183, 117895), (219, 98515), (255, 84607), (285, 75701), (305, 70737), (323, 66795), (365, 59109), (915, 23579), (969, 22265), (1037, 20805), (1095, 19703), (1159, 18615), (1241, 17385), (1387, 15555), (1615, 13359), (3111, 6935), (3477, 6205), (3723, 5795), (4161, 5185), (4453, 4845)]