16400900

素因数分解:

$2^2\times 5^2\times {\mathrm{401}}^1\times {\mathrm{409}}^1$

素因数の和:824

約数の個数: 36

約数和(自身を含む): 35765940

約数和(自身を除く): 19365040

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 401, 409, 802, 818, 1604, 1636, 2005, 2045, 4010, 4090, 8020, 8180, 10025, 10225, 20050, 20450, 40100, 40900, 164009, 328018, 656036, 820045, 1640090, 3280180, 4100225, 8200450, 16400900]

約数ペア:

[(1, 16400900), (2, 8200450), (4, 4100225), (5, 3280180), (10, 1640090), (20, 820045), (25, 656036), (50, 328018), (100, 164009), (401, 40900), (409, 40100), (802, 20450), (818, 20050), (1604, 10225), (1636, 10025), (2005, 8180), (2045, 8020), (4010, 4090)]