21996040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49991}}^1$

素因数の和:50013

約数の個数: 32

約数和(自身を含む): 53991360

約数和(自身を除く): 31995320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49991, 99982, 199964, 249955, 399928, 499910, 549901, 999820, 1099802, 1999640, 2199604, 2749505, 4399208, 5499010, 10998020, 21996040]

約数ペア:

[(1, 21996040), (2, 10998020), (4, 5499010), (5, 4399208), (8, 2749505), (10, 2199604), (11, 1999640), (20, 1099802), (22, 999820), (40, 549901), (44, 499910), (55, 399928), (88, 249955), (110, 199964), (220, 99982), (440, 49991)]