21137560

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1667}}^1$

素因数の和:1995

約数の個数: 32

約数和(自身を含む): 47738160

約数和(自身を除く): 26600600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 1667, 2536, 3170, 3334, 6340, 6668, 8335, 12680, 13336, 16670, 33340, 66680, 528439, 1056878, 2113756, 2642195, 4227512, 5284390, 10568780, 21137560]

約数ペア:

[(1, 21137560), (2, 10568780), (4, 5284390), (5, 4227512), (8, 2642195), (10, 2113756), (20, 1056878), (40, 528439), (317, 66680), (634, 33340), (1268, 16670), (1585, 13336), (1667, 12680), (2536, 8335), (3170, 6668), (3334, 6340)]