18988880

素因数分解:

$2^4\times 5^1\times {\mathrm{237361}}^1$

素因数の和:237374

約数の個数: 20

約数和(自身を含む): 44149332

約数和(自身を除く): 25160452

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237361, 474722, 949444, 1186805, 1898888, 2373610, 3797776, 4747220, 9494440, 18988880]

約数ペア:

[(1, 18988880), (2, 9494440), (4, 4747220), (5, 3797776), (8, 2373610), (10, 1898888), (16, 1186805), (20, 949444), (40, 474722), (80, 237361)]