21279519

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{173}}^2$

素因数の和:431

約数の個数: 18

約数和(自身を含む): 31307120

約数和(自身を除く): 10027601

約数列:

[1, 3, 9, 79, 173, 237, 519, 711, 1557, 13667, 29929, 41001, 89787, 123003, 269361, 2364391, 7093173, 21279519]

約数ペア:

[(1, 21279519), (3, 7093173), (9, 2364391), (79, 269361), (173, 123003), (237, 89787), (519, 41001), (711, 29929), (1557, 13667)]