20427280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:272

約数の個数: 80

約数和(自身を含む): 50889600

約数和(自身を除く): 30462320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 89, 95, 151, 152, 178, 190, 302, 304, 356, 380, 445, 604, 712, 755, 760, 890, 1208, 1424, 1510, 1520, 1691, 1780, 2416, 2869, 3020, 3382, 3560, 5738, 6040, 6764, 7120, 8455, 11476, 12080, 13439, 13528, 14345, 16910, 22952, 26878, 27056, 28690, 33820, 45904, 53756, 57380, 67195, 67640, 107512, 114760, 134390, 135280, 215024, 229520, 255341, 268780, 510682, 537560, 1021364, 1075120, 1276705, 2042728, 2553410, 4085456, 5106820, 10213640, 20427280]

約数ペア:

[(1, 20427280), (2, 10213640), (4, 5106820), (5, 4085456), (8, 2553410), (10, 2042728), (16, 1276705), (19, 1075120), (20, 1021364), (38, 537560), (40, 510682), (76, 268780), (80, 255341), (89, 229520), (95, 215024), (151, 135280), (152, 134390), (178, 114760), (190, 107512), (302, 67640), (304, 67195), (356, 57380), (380, 53756), (445, 45904), (604, 33820), (712, 28690), (755, 27056), (760, 26878), (890, 22952), (1208, 16910), (1424, 14345), (1510, 13528), (1520, 13439), (1691, 12080), (1780, 11476), (2416, 8455), (2869, 7120), (3020, 6764), (3382, 6040), (3560, 5738)]