20709790

素因数分解:

$2^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{15809}}^1$

素因数の和:15947

約数の個数: 16

約数和(自身を含む): 37564560

約数和(自身を除く): 16854770

約数列:

[1, 2, 5, 10, 131, 262, 655, 1310, 15809, 31618, 79045, 158090, 2070979, 4141958, 10354895, 20709790]

約数ペア:

[(1, 20709790), (2, 10354895), (5, 4141958), (10, 2070979), (131, 158090), (262, 79045), (655, 31618), (1310, 15809)]