16998040

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1039}}^1$

素因数の和:1459

約数の個数: 32

約数和(自身を含む): 38376000

約数和(自身を除く): 21377960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1039, 1636, 2045, 2078, 3272, 4090, 4156, 5195, 8180, 8312, 10390, 16360, 20780, 41560, 424951, 849902, 1699804, 2124755, 3399608, 4249510, 8499020, 16998040]

約数ペア:

[(1, 16998040), (2, 8499020), (4, 4249510), (5, 3399608), (8, 2124755), (10, 1699804), (20, 849902), (40, 424951), (409, 41560), (818, 20780), (1039, 16360), (1636, 10390), (2045, 8312), (2078, 8180), (3272, 5195), (4090, 4156)]