18987560

素因数分解:

$2^3\times 5^1\times {\mathrm{479}}^1\times {\mathrm{991}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 42854400

約数和(自身を除く): 23866840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 479, 958, 991, 1916, 1982, 2395, 3832, 3964, 4790, 4955, 7928, 9580, 9910, 19160, 19820, 39640, 474689, 949378, 1898756, 2373445, 3797512, 4746890, 9493780, 18987560]

約数ペア:

[(1, 18987560), (2, 9493780), (4, 4746890), (5, 3797512), (8, 2373445), (10, 1898756), (20, 949378), (40, 474689), (479, 39640), (958, 19820), (991, 19160), (1916, 9910), (1982, 9580), (2395, 7928), (3832, 4955), (3964, 4790)]