21639231

素因数分解:

$3^4\times {\mathrm{463}}^1\times {\mathrm{577}}^1$

素因数の和:1052

約数の個数: 20

約数和(自身を含む): 32451232

約数和(自身を除く): 10812001

約数列:

[1, 3, 9, 27, 81, 463, 577, 1389, 1731, 4167, 5193, 12501, 15579, 37503, 46737, 267151, 801453, 2404359, 7213077, 21639231]

約数ペア:

[(1, 21639231), (3, 7213077), (9, 2404359), (27, 801453), (81, 267151), (463, 46737), (577, 37503), (1389, 15579), (1731, 12501), (4167, 5193)]