20977292

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 46347840

約数和(自身を除く): 25370548

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 43, 49, 76, 86, 98, 131, 133, 172, 196, 262, 266, 301, 524, 532, 602, 817, 917, 931, 1204, 1634, 1834, 1862, 2107, 2489, 3268, 3668, 3724, 4214, 4978, 5633, 5719, 6419, 8428, 9956, 11266, 11438, 12838, 17423, 22532, 22876, 25676, 34846, 39431, 40033, 69692, 78862, 80066, 107027, 121961, 157724, 160132, 214054, 243922, 276017, 428108, 487844, 552034, 749189, 1104068, 1498378, 2996756, 5244323, 10488646, 20977292]

約数ペア:

[(1, 20977292), (2, 10488646), (4, 5244323), (7, 2996756), (14, 1498378), (19, 1104068), (28, 749189), (38, 552034), (43, 487844), (49, 428108), (76, 276017), (86, 243922), (98, 214054), (131, 160132), (133, 157724), (172, 121961), (196, 107027), (262, 80066), (266, 78862), (301, 69692), (524, 40033), (532, 39431), (602, 34846), (817, 25676), (917, 22876), (931, 22532), (1204, 17423), (1634, 12838), (1834, 11438), (1862, 11266), (2107, 9956), (2489, 8428), (3268, 6419), (3668, 5719), (3724, 5633), (4214, 4978)]