28409978

素因数分解:

$2^1\times {\mathrm{19}}^4\times {\mathrm{109}}^1$

素因数の和:187

約数の個数: 20

約数和(自身を含む): 45395130

約数和(自身を除く): 16985152

約数列:

[1, 2, 19, 38, 109, 218, 361, 722, 2071, 4142, 6859, 13718, 39349, 78698, 130321, 260642, 747631, 1495262, 14204989, 28409978]

約数ペア:

[(1, 28409978), (2, 14204989), (19, 1495262), (38, 747631), (109, 260642), (218, 130321), (361, 78698), (722, 39349), (2071, 13718), (4142, 6859)]