19666521

素因数分解:

$3^2\times 7^1\times {\mathrm{487}}^1\times {\mathrm{641}}^1$

素因数の和:1141

約数の個数: 24

約数和(自身を含む): 32582784

約数和(自身を除く): 12916263

約数列:

[1, 3, 7, 9, 21, 63, 487, 641, 1461, 1923, 3409, 4383, 4487, 5769, 10227, 13461, 30681, 40383, 312167, 936501, 2185169, 2809503, 6555507, 19666521]

約数ペア:

[(1, 19666521), (3, 6555507), (7, 2809503), (9, 2185169), (21, 936501), (63, 312167), (487, 40383), (641, 30681), (1461, 13461), (1923, 10227), (3409, 5769), (4383, 4487)]