18372280

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1123}}^1$

素因数の和:1543

約数の個数: 32

約数和(自身を含む): 41475600

約数和(自身を除く): 23103320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1123, 1636, 2045, 2246, 3272, 4090, 4492, 5615, 8180, 8984, 11230, 16360, 22460, 44920, 459307, 918614, 1837228, 2296535, 3674456, 4593070, 9186140, 18372280]

約数ペア:

[(1, 18372280), (2, 9186140), (4, 4593070), (5, 3674456), (8, 2296535), (10, 1837228), (20, 918614), (40, 459307), (409, 44920), (818, 22460), (1123, 16360), (1636, 11230), (2045, 8984), (2246, 8180), (3272, 5615), (4090, 4492)]