20989724

素因数分解:

$2^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{3767}}^1$

素因数の和:3977

約数の個数: 24

約数和(自身を含む): 42201600

約数和(自身を除く): 21211876

約数列:

[1, 2, 4, 7, 14, 28, 199, 398, 796, 1393, 2786, 3767, 5572, 7534, 15068, 26369, 52738, 105476, 749633, 1499266, 2998532, 5247431, 10494862, 20989724]

約数ペア:

[(1, 20989724), (2, 10494862), (4, 5247431), (7, 2998532), (14, 1499266), (28, 749633), (199, 105476), (398, 52738), (796, 26369), (1393, 15068), (2786, 7534), (3767, 5572)]