21302800

素因数分解:

$2^4\times 5^2\times {\mathrm{19}}^1\times {\mathrm{2803}}^1$

素因数の和:2840

約数の個数: 60

約数和(自身を含む): 53892880

約数和(自身を除く): 32590080

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 38, 40, 50, 76, 80, 95, 100, 152, 190, 200, 304, 380, 400, 475, 760, 950, 1520, 1900, 2803, 3800, 5606, 7600, 11212, 14015, 22424, 28030, 44848, 53257, 56060, 70075, 106514, 112120, 140150, 213028, 224240, 266285, 280300, 426056, 532570, 560600, 852112, 1065140, 1121200, 1331425, 2130280, 2662850, 4260560, 5325700, 10651400, 21302800]

約数ペア:

[(1, 21302800), (2, 10651400), (4, 5325700), (5, 4260560), (8, 2662850), (10, 2130280), (16, 1331425), (19, 1121200), (20, 1065140), (25, 852112), (38, 560600), (40, 532570), (50, 426056), (76, 280300), (80, 266285), (95, 224240), (100, 213028), (152, 140150), (190, 112120), (200, 106514), (304, 70075), (380, 56060), (400, 53257), (475, 44848), (760, 28030), (950, 22424), (1520, 14015), (1900, 11212), (2803, 7600), (3800, 5606)]