21928959

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 36953280

約数和(自身を除く): 15024321

約数列:

[1, 3, 9, 13, 23, 29, 39, 69, 87, 117, 207, 261, 281, 299, 377, 667, 843, 897, 1131, 2001, 2529, 2691, 3393, 3653, 6003, 6463, 8149, 8671, 10959, 19389, 24447, 26013, 32877, 58167, 73341, 78039, 84019, 105937, 187427, 252057, 317811, 562281, 756171, 953433, 1686843, 2436551, 7309653, 21928959]

約数ペア:

[(1, 21928959), (3, 7309653), (9, 2436551), (13, 1686843), (23, 953433), (29, 756171), (39, 562281), (69, 317811), (87, 252057), (117, 187427), (207, 105937), (261, 84019), (281, 78039), (299, 73341), (377, 58167), (667, 32877), (843, 26013), (897, 24447), (1131, 19389), (2001, 10959), (2529, 8671), (2691, 8149), (3393, 6463), (3653, 6003)]