18990680

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2129}}^1$

素因数の和:2363

約数の個数: 32

約数和(自身を含む): 42940800

約数和(自身を除く): 23950120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2129, 2230, 4258, 4460, 8516, 8920, 10645, 17032, 21290, 42580, 85160, 474767, 949534, 1899068, 2373835, 3798136, 4747670, 9495340, 18990680]

約数ペア:

[(1, 18990680), (2, 9495340), (4, 4747670), (5, 3798136), (8, 2373835), (10, 1899068), (20, 949534), (40, 474767), (223, 85160), (446, 42580), (892, 21290), (1115, 17032), (1784, 10645), (2129, 8920), (2230, 8516), (4258, 4460)]