21329978

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{1259}}^1$

素因数の和:1501

約数の個数: 16

約数和(自身を含む): 32931360

約数和(自身を除く): 11601382

約数列:

[1, 2, 43, 86, 197, 394, 1259, 2518, 8471, 16942, 54137, 108274, 248023, 496046, 10664989, 21329978]

約数ペア:

[(1, 21329978), (2, 10664989), (43, 496046), (86, 248023), (197, 108274), (394, 54137), (1259, 16942), (2518, 8471)]