21608560

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1051}}^1$

素因数の和:1321

約数の個数: 40

約数和(自身を含む): 50483376

約数和(自身を除く): 28874816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 1028, 1051, 1285, 2056, 2102, 2570, 4112, 4204, 5140, 5255, 8408, 10280, 10510, 16816, 20560, 21020, 42040, 84080, 270107, 540214, 1080428, 1350535, 2160856, 2701070, 4321712, 5402140, 10804280, 21608560]

約数ペア:

[(1, 21608560), (2, 10804280), (4, 5402140), (5, 4321712), (8, 2701070), (10, 2160856), (16, 1350535), (20, 1080428), (40, 540214), (80, 270107), (257, 84080), (514, 42040), (1028, 21020), (1051, 20560), (1285, 16816), (2056, 10510), (2102, 10280), (2570, 8408), (4112, 5255), (4204, 5140)]