20554947

素因数分解:

$3^2\times 7^1\times {\mathrm{509}}^1\times {\mathrm{641}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 34051680

約数和(自身を除く): 13496733

約数列:

[1, 3, 7, 9, 21, 63, 509, 641, 1527, 1923, 3563, 4487, 4581, 5769, 10689, 13461, 32067, 40383, 326269, 978807, 2283883, 2936421, 6851649, 20554947]

約数ペア:

[(1, 20554947), (3, 6851649), (7, 2936421), (9, 2283883), (21, 978807), (63, 326269), (509, 40383), (641, 32067), (1527, 13461), (1923, 10689), (3563, 5769), (4487, 4581)]