20640746

素因数分解:

$2^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{39847}}^1$

素因数の和:39893

約数の個数: 16

約数和(自身を含む): 36341376

約数和(自身を除く): 15700630

約数列:

[1, 2, 7, 14, 37, 74, 259, 518, 39847, 79694, 278929, 557858, 1474339, 2948678, 10320373, 20640746]

約数ペア:

[(1, 20640746), (2, 10320373), (7, 2948678), (14, 1474339), (37, 557858), (74, 278929), (259, 79694), (518, 39847)]