200720840

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{12269}}^1$

素因数の和:12689

約数の個数: 32

約数和(自身を含む): 452763000

約数和(自身を除く): 252042160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 8180, 12269, 16360, 24538, 49076, 61345, 98152, 122690, 245380, 490760, 5018021, 10036042, 20072084, 25090105, 40144168, 50180210, 100360420, 200720840]

約数ペア:

[(1, 200720840), (2, 100360420), (4, 50180210), (5, 40144168), (8, 25090105), (10, 20072084), (20, 10036042), (40, 5018021), (409, 490760), (818, 245380), (1636, 122690), (2045, 98152), (3272, 61345), (4090, 49076), (8180, 24538), (12269, 16360)]