21089264

素因数分解:

$2^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:238

約数の個数: 80

約数和(自身を含む): 49758720

約数和(自身を除く): 28669456

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 43, 56, 58, 86, 112, 116, 151, 172, 203, 232, 301, 302, 344, 406, 464, 602, 604, 688, 812, 1057, 1204, 1208, 1247, 1624, 2114, 2408, 2416, 2494, 3248, 4228, 4379, 4816, 4988, 6493, 8456, 8729, 8758, 9976, 12986, 16912, 17458, 17516, 19952, 25972, 30653, 34916, 35032, 45451, 51944, 61306, 69832, 70064, 90902, 103888, 122612, 139664, 181804, 188297, 245224, 363608, 376594, 490448, 727216, 753188, 1318079, 1506376, 2636158, 3012752, 5272316, 10544632, 21089264]

約数ペア:

[(1, 21089264), (2, 10544632), (4, 5272316), (7, 3012752), (8, 2636158), (14, 1506376), (16, 1318079), (28, 753188), (29, 727216), (43, 490448), (56, 376594), (58, 363608), (86, 245224), (112, 188297), (116, 181804), (151, 139664), (172, 122612), (203, 103888), (232, 90902), (301, 70064), (302, 69832), (344, 61306), (406, 51944), (464, 45451), (602, 35032), (604, 34916), (688, 30653), (812, 25972), (1057, 19952), (1204, 17516), (1208, 17458), (1247, 16912), (1624, 12986), (2114, 9976), (2408, 8758), (2416, 8729), (2494, 8456), (3248, 6493), (4228, 4988), (4379, 4816)]