20943964

素因数分解:

$2^2\times {\mathrm{139}}^2\times {\mathrm{271}}^1$

素因数の和:553

約数の個数: 18

約数和(自身を含む): 37053744

約数和(自身を除く): 16109780

約数列:

[1, 2, 4, 139, 271, 278, 542, 556, 1084, 19321, 37669, 38642, 75338, 77284, 150676, 5235991, 10471982, 20943964]

約数ペア:

[(1, 20943964), (2, 10471982), (4, 5235991), (139, 150676), (271, 77284), (278, 75338), (542, 38642), (556, 37669), (1084, 19321)]