21189951

素因数分解:

$3^3\times {\mathrm{557}}^1\times {\mathrm{1409}}^1$

素因数の和:1975

約数の個数: 16

約数和(自身を含む): 31471200

約数和(自身を除く): 10281249

約数列:

[1, 3, 9, 27, 557, 1409, 1671, 4227, 5013, 12681, 15039, 38043, 784813, 2354439, 7063317, 21189951]

約数ペア:

[(1, 21189951), (3, 7063317), (9, 2354439), (27, 784813), (557, 38043), (1409, 15039), (1671, 12681), (4227, 5013)]