20781313

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{167}}^1\times {\mathrm{613}}^1$

素因数の和:816

約数の個数: 16

約数和(自身を含む): 24756480

約数和(自身を除く): 3975167

約数列:

[1, 7, 29, 167, 203, 613, 1169, 4291, 4843, 17777, 33901, 102371, 124439, 716597, 2968759, 20781313]

約数ペア:

[(1, 20781313), (7, 2968759), (29, 716597), (167, 124439), (203, 102371), (613, 33901), (1169, 17777), (4291, 4843)]