21297556

素因数分解:

$2^2\times 7^3\times {\mathrm{19}}^2\times {\mathrm{43}}^1$

素因数の和:106

約数の個数: 72

約数和(自身を含む): 46939200

約数和(自身を除く): 25641644

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 43, 49, 76, 86, 98, 133, 172, 196, 266, 301, 343, 361, 532, 602, 686, 722, 817, 931, 1204, 1372, 1444, 1634, 1862, 2107, 2527, 3268, 3724, 4214, 5054, 5719, 6517, 8428, 10108, 11438, 13034, 14749, 15523, 17689, 22876, 26068, 29498, 31046, 35378, 40033, 58996, 62092, 70756, 80066, 108661, 123823, 160132, 217322, 247646, 280231, 434644, 495292, 560462, 760627, 1120924, 1521254, 3042508, 5324389, 10648778, 21297556]

約数ペア:

[(1, 21297556), (2, 10648778), (4, 5324389), (7, 3042508), (14, 1521254), (19, 1120924), (28, 760627), (38, 560462), (43, 495292), (49, 434644), (76, 280231), (86, 247646), (98, 217322), (133, 160132), (172, 123823), (196, 108661), (266, 80066), (301, 70756), (343, 62092), (361, 58996), (532, 40033), (602, 35378), (686, 31046), (722, 29498), (817, 26068), (931, 22876), (1204, 17689), (1372, 15523), (1444, 14749), (1634, 13034), (1862, 11438), (2107, 10108), (2527, 8428), (3268, 6517), (3724, 5719), (4214, 5054)]