21771356

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{2521}}^1$

素因数の和:2669

約数の個数: 24

約数和(自身を含む): 40674816

約数和(自身を除く): 18903460

約数列:

[1, 2, 4, 17, 34, 68, 127, 254, 508, 2159, 2521, 4318, 5042, 8636, 10084, 42857, 85714, 171428, 320167, 640334, 1280668, 5442839, 10885678, 21771356]

約数ペア:

[(1, 21771356), (2, 10885678), (4, 5442839), (17, 1280668), (34, 640334), (68, 320167), (127, 171428), (254, 85714), (508, 42857), (2159, 10084), (2521, 8636), (4318, 5042)]