21727989

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 13652811

約数列:

[1, 3, 9, 17, 29, 51, 59, 83, 87, 153, 177, 249, 261, 493, 531, 747, 1003, 1411, 1479, 1711, 2407, 3009, 4233, 4437, 4897, 5133, 7221, 9027, 12699, 14691, 15399, 21663, 29087, 40919, 44073, 83249, 87261, 122757, 142013, 249747, 261783, 368271, 426039, 749241, 1278117, 2414221, 7242663, 21727989]

約数ペア:

[(1, 21727989), (3, 7242663), (9, 2414221), (17, 1278117), (29, 749241), (51, 426039), (59, 368271), (83, 261783), (87, 249747), (153, 142013), (177, 122757), (249, 87261), (261, 83249), (493, 44073), (531, 40919), (747, 29087), (1003, 21663), (1411, 15399), (1479, 14691), (1711, 12699), (2407, 9027), (3009, 7221), (4233, 5133), (4437, 4897)]