21085660

素因数分解:

$2^2\times 5^1\times {\mathrm{709}}^1\times {\mathrm{1487}}^1$

素因数の和:2205

約数の個数: 24

約数和(自身を含む): 44372160

約数和(自身を除く): 23286500

約数列:

[1, 2, 4, 5, 10, 20, 709, 1418, 1487, 2836, 2974, 3545, 5948, 7090, 7435, 14180, 14870, 29740, 1054283, 2108566, 4217132, 5271415, 10542830, 21085660]

約数ペア:

[(1, 21085660), (2, 10542830), (4, 5271415), (5, 4217132), (10, 2108566), (20, 1054283), (709, 29740), (1418, 14870), (1487, 14180), (2836, 7435), (2974, 7090), (3545, 5948)]