19680640

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:240

約数の個数: 128

約数和(自身を含む): 56401920

約数和(自身を除く): 36721280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 64, 70, 80, 92, 112, 115, 128, 140, 160, 161, 184, 191, 224, 230, 280, 320, 322, 368, 382, 448, 460, 560, 640, 644, 736, 764, 805, 896, 920, 955, 1120, 1288, 1337, 1472, 1528, 1610, 1840, 1910, 2240, 2576, 2674, 2944, 3056, 3220, 3680, 3820, 4393, 4480, 5152, 5348, 6112, 6440, 6685, 7360, 7640, 8786, 10304, 10696, 12224, 12880, 13370, 14720, 15280, 17572, 20608, 21392, 21965, 24448, 25760, 26740, 30560, 30751, 35144, 42784, 43930, 51520, 53480, 61120, 61502, 70288, 85568, 87860, 103040, 106960, 122240, 123004, 140576, 153755, 171136, 175720, 213920, 246008, 281152, 307510, 351440, 427840, 492016, 562304, 615020, 702880, 855680, 984032, 1230040, 1405760, 1968064, 2460080, 2811520, 3936128, 4920160, 9840320, 19680640]

約数ペア:

[(1, 19680640), (2, 9840320), (4, 4920160), (5, 3936128), (7, 2811520), (8, 2460080), (10, 1968064), (14, 1405760), (16, 1230040), (20, 984032), (23, 855680), (28, 702880), (32, 615020), (35, 562304), (40, 492016), (46, 427840), (56, 351440), (64, 307510), (70, 281152), (80, 246008), (92, 213920), (112, 175720), (115, 171136), (128, 153755), (140, 140576), (160, 123004), (161, 122240), (184, 106960), (191, 103040), (224, 87860), (230, 85568), (280, 70288), (320, 61502), (322, 61120), (368, 53480), (382, 51520), (448, 43930), (460, 42784), (560, 35144), (640, 30751), (644, 30560), (736, 26740), (764, 25760), (805, 24448), (896, 21965), (920, 21392), (955, 20608), (1120, 17572), (1288, 15280), (1337, 14720), (1472, 13370), (1528, 12880), (1610, 12224), (1840, 10696), (1910, 10304), (2240, 8786), (2576, 7640), (2674, 7360), (2944, 6685), (3056, 6440), (3220, 6112), (3680, 5348), (3820, 5152), (4393, 4480)]