21000944853

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{69899}}^1$

素因数の和:70182

約数の個数: 48

約数和(自身を含む): 36638784000

約数和(自身を除く): 15637839147

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 251, 399, 753, 1197, 1757, 2259, 4769, 5271, 14307, 15813, 33383, 42921, 69899, 100149, 209697, 300447, 489293, 629091, 1328081, 1467879, 3984243, 4403637, 9296567, 11952729, 17544649, 27889701, 52633947, 83669103, 122812543, 157901841, 333348331, 368437629, 1000044993, 1105312887, 2333438317, 3000134979, 7000314951, 21000944853]

約数ペア:

[(1, 21000944853), (3, 7000314951), (7, 3000134979), (9, 2333438317), (19, 1105312887), (21, 1000044993), (57, 368437629), (63, 333348331), (133, 157901841), (171, 122812543), (251, 83669103), (399, 52633947), (753, 27889701), (1197, 17544649), (1757, 11952729), (2259, 9296567), (4769, 4403637), (5271, 3984243), (14307, 1467879), (15813, 1328081), (33383, 629091), (42921, 489293), (69899, 300447), (100149, 209697)]