21625681

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{12211}}^1$

素因数の和:12252

約数の個数: 16

約数和(自身を含む): 28136448

約数和(自身を除く): 6510767

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 12211, 85477, 134321, 280853, 940247, 1965971, 3089383, 21625681]

約数ペア:

[(1, 21625681), (7, 3089383), (11, 1965971), (23, 940247), (77, 280853), (161, 134321), (253, 85477), (1771, 12211)]