21195549

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:350

約数の個数: 36

約数和(自身を含む): 33763860

約数和(自身を除く): 12568311

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 281, 289, 493, 843, 867, 1479, 2529, 2601, 4437, 4777, 8149, 8381, 14331, 24447, 25143, 42993, 73341, 75429, 81209, 138533, 243627, 415599, 730881, 1246797, 2355061, 7065183, 21195549]

約数ペア:

[(1, 21195549), (3, 7065183), (9, 2355061), (17, 1246797), (29, 730881), (51, 415599), (87, 243627), (153, 138533), (261, 81209), (281, 75429), (289, 73341), (493, 42993), (843, 25143), (867, 24447), (1479, 14331), (2529, 8381), (2601, 8149), (4437, 4777)]