28390640

素因数分解:

$2^4\times 5^1\times {\mathrm{354883}}^1$

素因数の和:354896

約数の個数: 20

約数和(自身を含む): 66008424

約数和(自身を除く): 37617784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 354883, 709766, 1419532, 1774415, 2839064, 3548830, 5678128, 7097660, 14195320, 28390640]

約数ペア:

[(1, 28390640), (2, 14195320), (4, 7097660), (5, 5678128), (8, 3548830), (10, 2839064), (16, 1774415), (20, 1419532), (40, 709766), (80, 354883)]