21581487

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{751}}^1$

素因数の和:891

約数の個数: 24

約数和(自身を含む): 32534528

約数和(自身を除く): 10953041

約数列:

[1, 3, 9, 31, 93, 103, 279, 309, 751, 927, 2253, 3193, 6759, 9579, 23281, 28737, 69843, 77353, 209529, 232059, 696177, 2397943, 7193829, 21581487]

約数ペア:

[(1, 21581487), (3, 7193829), (9, 2397943), (31, 696177), (93, 232059), (103, 209529), (279, 77353), (309, 69843), (751, 28737), (927, 23281), (2253, 9579), (3193, 6759)]