21980312

素因数分解:

$2^3\times {\mathrm{643}}^1\times {\mathrm{4273}}^1$

素因数の和:4922

約数の個数: 16

約数和(自身を含む): 41286840

約数和(自身を除く): 19306528

約数列:

[1, 2, 4, 8, 643, 1286, 2572, 4273, 5144, 8546, 17092, 34184, 2747539, 5495078, 10990156, 21980312]

約数ペア:

[(1, 21980312), (2, 10990156), (4, 5495078), (8, 2747539), (643, 34184), (1286, 17092), (2572, 8546), (4273, 5144)]