21920144

素因数分解:

$2^4\times {\mathrm{331}}^1\times {\mathrm{4139}}^1$

素因数の和:4478

約数の個数: 20

約数和(自身を含む): 42608880

約数和(自身を除く): 20688736

約数列:

[1, 2, 4, 8, 16, 331, 662, 1324, 2648, 4139, 5296, 8278, 16556, 33112, 66224, 1370009, 2740018, 5480036, 10960072, 21920144]

約数ペア:

[(1, 21920144), (2, 10960072), (4, 5480036), (8, 2740018), (16, 1370009), (331, 66224), (662, 33112), (1324, 16556), (2648, 8278), (4139, 5296)]