20344120

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1979}}^1$

素因数の和:2247

約数の個数: 32

約数和(自身を含む): 45975600

約数和(自身を除く): 25631480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1979, 2056, 2570, 3958, 5140, 7916, 9895, 10280, 15832, 19790, 39580, 79160, 508603, 1017206, 2034412, 2543015, 4068824, 5086030, 10172060, 20344120]

約数ペア:

[(1, 20344120), (2, 10172060), (4, 5086030), (5, 4068824), (8, 2543015), (10, 2034412), (20, 1017206), (40, 508603), (257, 79160), (514, 39580), (1028, 19790), (1285, 15832), (1979, 10280), (2056, 9895), (2570, 7916), (3958, 5140)]