21351385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{3769}}^1$

素因数の和:3888

約数の個数: 16

約数和(自身を含む): 28229760

約数和(自身を除く): 6878375

約数列:

[1, 5, 11, 55, 103, 515, 1133, 3769, 5665, 18845, 41459, 207295, 388207, 1941035, 4270277, 21351385]

約数ペア:

[(1, 21351385), (5, 4270277), (11, 1941035), (55, 388207), (103, 207295), (515, 41459), (1133, 18845), (3769, 5665)]