20520988

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{3803}}^1$

素因数の和:3897

約数の個数: 24

約数和(自身を含む): 38344320

約数和(自身を除く): 17823332

約数列:

[1, 2, 4, 19, 38, 71, 76, 142, 284, 1349, 2698, 3803, 5396, 7606, 15212, 72257, 144514, 270013, 289028, 540026, 1080052, 5130247, 10260494, 20520988]

約数ペア:

[(1, 20520988), (2, 10260494), (4, 5130247), (19, 1080052), (38, 540026), (71, 289028), (76, 270013), (142, 144514), (284, 72257), (1349, 15212), (2698, 7606), (3803, 5396)]