20161280

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{829}}^1$

素因数の和:869

約数の個数: 72

約数和(自身を含む): 50895600

約数和(自身を除く): 30734320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 608, 640, 760, 829, 1216, 1280, 1520, 1658, 2432, 3040, 3316, 4145, 4864, 6080, 6632, 8290, 12160, 13264, 15751, 16580, 24320, 26528, 31502, 33160, 53056, 63004, 66320, 78755, 106112, 126008, 132640, 157510, 212224, 252016, 265280, 315020, 504032, 530560, 630040, 1008064, 1061120, 1260080, 2016128, 2520160, 4032256, 5040320, 10080640, 20161280]

約数ペア:

[(1, 20161280), (2, 10080640), (4, 5040320), (5, 4032256), (8, 2520160), (10, 2016128), (16, 1260080), (19, 1061120), (20, 1008064), (32, 630040), (38, 530560), (40, 504032), (64, 315020), (76, 265280), (80, 252016), (95, 212224), (128, 157510), (152, 132640), (160, 126008), (190, 106112), (256, 78755), (304, 66320), (320, 63004), (380, 53056), (608, 33160), (640, 31502), (760, 26528), (829, 24320), (1216, 16580), (1280, 15751), (1520, 13264), (1658, 12160), (2432, 8290), (3040, 6632), (3316, 6080), (4145, 4864)]