21204423

素因数分解:

$3^6\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:123

約数の個数: 56

約数和(自身を含む): 35413200

約数和(自身を除く): 14208777

約数列:

[1, 3, 9, 17, 27, 29, 51, 59, 81, 87, 153, 177, 243, 261, 459, 493, 531, 729, 783, 1003, 1377, 1479, 1593, 1711, 2349, 3009, 4131, 4437, 4779, 5133, 7047, 9027, 12393, 13311, 14337, 15399, 21141, 27081, 29087, 39933, 43011, 46197, 81243, 87261, 119799, 138591, 243729, 261783, 359397, 415773, 731187, 785349, 1247319, 2356047, 7068141, 21204423]

約数ペア:

[(1, 21204423), (3, 7068141), (9, 2356047), (17, 1247319), (27, 785349), (29, 731187), (51, 415773), (59, 359397), (81, 261783), (87, 243729), (153, 138591), (177, 119799), (243, 87261), (261, 81243), (459, 46197), (493, 43011), (531, 39933), (729, 29087), (783, 27081), (1003, 21141), (1377, 15399), (1479, 14337), (1593, 13311), (1711, 12393), (2349, 9027), (3009, 7047), (4131, 5133), (4437, 4779)]