20515160

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1279}}^1$

素因数の和:1691

約数の個数: 32

約数和(自身を含む): 46310400

約数和(自身を除く): 25795240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1279, 1604, 2005, 2558, 3208, 4010, 5116, 6395, 8020, 10232, 12790, 16040, 25580, 51160, 512879, 1025758, 2051516, 2564395, 4103032, 5128790, 10257580, 20515160]

約数ペア:

[(1, 20515160), (2, 10257580), (4, 5128790), (5, 4103032), (8, 2564395), (10, 2051516), (20, 1025758), (40, 512879), (401, 51160), (802, 25580), (1279, 16040), (1604, 12790), (2005, 10232), (2558, 8020), (3208, 6395), (4010, 5116)]