20665616

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{67979}}^1$

素因数の和:68006

約数の個数: 20

約数和(自身を含む): 42147600

約数和(自身を除く): 21481984

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 67979, 135958, 271916, 543832, 1087664, 1291601, 2583202, 5166404, 10332808, 20665616]

約数ペア:

[(1, 20665616), (2, 10332808), (4, 5166404), (8, 2583202), (16, 1291601), (19, 1087664), (38, 543832), (76, 271916), (152, 135958), (304, 67979)]