21702760

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{2063}}^1$

素因数の和:2337

約数の個数: 32

約数和(自身を含む): 49040640

約数和(自身を除く): 27337880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2063, 2104, 2630, 4126, 5260, 8252, 10315, 10520, 16504, 20630, 41260, 82520, 542569, 1085138, 2170276, 2712845, 4340552, 5425690, 10851380, 21702760]

約数ペア:

[(1, 21702760), (2, 10851380), (4, 5425690), (5, 4340552), (8, 2712845), (10, 2170276), (20, 1085138), (40, 542569), (263, 82520), (526, 41260), (1052, 20630), (1315, 16504), (2063, 10520), (2104, 10315), (2630, 8252), (4126, 5260)]