81590416

素因数分解:

$2^4\times {\mathrm{389}}^1\times {\mathrm{13109}}^1$

素因数の和:13506

約数の個数: 20

約数和(自身を含む): 158499900

約数和(自身を除く): 76909484

約数列:

[1, 2, 4, 8, 16, 389, 778, 1556, 3112, 6224, 13109, 26218, 52436, 104872, 209744, 5099401, 10198802, 20397604, 40795208, 81590416]

約数ペア:

[(1, 81590416), (2, 40795208), (4, 20397604), (8, 10198802), (16, 5099401), (389, 209744), (778, 104872), (1556, 52436), (3112, 26218), (6224, 13109)]