21018668

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43427}}^1$

素因数の和:43453

約数の個数: 18

約数和(自身を含む): 40431468

約数和(自身を除く): 19412800

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43427, 86854, 173708, 477697, 955394, 1910788, 5254667, 10509334, 21018668]

約数ペア:

[(1, 21018668), (2, 10509334), (4, 5254667), (11, 1910788), (22, 955394), (44, 477697), (121, 173708), (242, 86854), (484, 43427)]