18971668

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{821}}^1$

素因数の和:987

約数の個数: 24

約数和(自身を含む): 34178760

約数和(自身を除く): 15207092

約数列:

[1, 2, 4, 53, 106, 109, 212, 218, 436, 821, 1642, 3284, 5777, 11554, 23108, 43513, 87026, 89489, 174052, 178978, 357956, 4742917, 9485834, 18971668]

約数ペア:

[(1, 18971668), (2, 9485834), (4, 4742917), (53, 357956), (106, 178978), (109, 174052), (212, 89489), (218, 87026), (436, 43513), (821, 23108), (1642, 11554), (3284, 5777)]