257130279

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{2347}}^1$

素因数の和:2444

約数の個数: 48

約数和(自身を含む): 445406208

約数和(自身を除く): 188275929

約数列:

[1, 3, 7, 9, 21, 37, 47, 63, 111, 141, 259, 329, 333, 423, 777, 987, 1739, 2331, 2347, 2961, 5217, 7041, 12173, 15651, 16429, 21123, 36519, 49287, 86839, 109557, 110309, 147861, 260517, 330927, 607873, 772163, 781551, 992781, 1823619, 2316489, 4081433, 5470857, 6949467, 12244299, 28570031, 36732897, 85710093, 257130279]

約数ペア:

[(1, 257130279), (3, 85710093), (7, 36732897), (9, 28570031), (21, 12244299), (37, 6949467), (47, 5470857), (63, 4081433), (111, 2316489), (141, 1823619), (259, 992781), (329, 781551), (333, 772163), (423, 607873), (777, 330927), (987, 260517), (1739, 147861), (2331, 110309), (2347, 109557), (2961, 86839), (5217, 49287), (7041, 36519), (12173, 21123), (15651, 16429)]