21756681

素因数分解:

$3^4\times {\mathrm{113}}^1\times {\mathrm{2377}}^1$

素因数の和:2502

約数の個数: 20

約数和(自身を含む): 32802132

約数和(自身を除く): 11045451

約数列:

[1, 3, 9, 27, 81, 113, 339, 1017, 2377, 3051, 7131, 9153, 21393, 64179, 192537, 268601, 805803, 2417409, 7252227, 21756681]

約数ペア:

[(1, 21756681), (3, 7252227), (9, 2417409), (27, 805803), (81, 268601), (113, 192537), (339, 64179), (1017, 21393), (2377, 9153), (3051, 7131)]