20689090

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{66739}}^1$

素因数の和:66777

約数の個数: 16

約数和(自身を含む): 38442240

約数和(自身を除く): 17753150

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 66739, 133478, 333695, 667390, 2068909, 4137818, 10344545, 20689090]

約数ペア:

[(1, 20689090), (2, 10344545), (5, 4137818), (10, 2068909), (31, 667390), (62, 333695), (155, 133478), (310, 66739)]