18988520

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4201}}^1$

素因数の和:4325

約数の個数: 32

約数和(自身を含む): 43112520

約数和(自身を除く): 24124000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4201, 4520, 8402, 16804, 21005, 33608, 42010, 84020, 168040, 474713, 949426, 1898852, 2373565, 3797704, 4747130, 9494260, 18988520]

約数ペア:

[(1, 18988520), (2, 9494260), (4, 4747130), (5, 3797704), (8, 2373565), (10, 1898852), (20, 949426), (40, 474713), (113, 168040), (226, 84020), (452, 42010), (565, 33608), (904, 21005), (1130, 16804), (2260, 8402), (4201, 4520)]