21519927

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{727}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 38158848

約数和(自身を除く): 16638921

約数列:

[1, 3, 9, 11, 13, 23, 33, 39, 69, 99, 117, 143, 207, 253, 299, 429, 727, 759, 897, 1287, 2181, 2277, 2691, 3289, 6543, 7997, 9451, 9867, 16721, 23991, 28353, 29601, 50163, 71973, 85059, 103961, 150489, 183931, 217373, 311883, 551793, 652119, 935649, 1655379, 1956357, 2391103, 7173309, 21519927]

約数ペア:

[(1, 21519927), (3, 7173309), (9, 2391103), (11, 1956357), (13, 1655379), (23, 935649), (33, 652119), (39, 551793), (69, 311883), (99, 217373), (117, 183931), (143, 150489), (207, 103961), (253, 85059), (299, 71973), (429, 50163), (727, 29601), (759, 28353), (897, 23991), (1287, 16721), (2181, 9867), (2277, 9451), (2691, 7997), (3289, 6543)]