20758815

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1997}}^1$

素因数の和:2029

約数の個数: 64

約数和(自身を含む): 46033920

約数和(自身を除く): 25275105

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 99, 105, 135, 165, 189, 231, 297, 315, 385, 495, 693, 945, 1155, 1485, 1997, 2079, 3465, 5991, 9985, 10395, 13979, 17973, 21967, 29955, 41937, 53919, 65901, 69895, 89865, 109835, 125811, 153769, 197703, 209685, 269595, 329505, 377433, 461307, 593109, 629055, 768845, 988515, 1383921, 1887165, 2306535, 2965545, 4151763, 6919605, 20758815]

約数ペア:

[(1, 20758815), (3, 6919605), (5, 4151763), (7, 2965545), (9, 2306535), (11, 1887165), (15, 1383921), (21, 988515), (27, 768845), (33, 629055), (35, 593109), (45, 461307), (55, 377433), (63, 329505), (77, 269595), (99, 209685), (105, 197703), (135, 153769), (165, 125811), (189, 109835), (231, 89865), (297, 69895), (315, 65901), (385, 53919), (495, 41937), (693, 29955), (945, 21967), (1155, 17973), (1485, 13979), (1997, 10395), (2079, 9985), (3465, 5991)]