280865840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{206519}}^1$

素因数の和:206549

約数の個数: 40

約数和(自身を含む): 691428960

約数和(自身を除く): 410563120

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 206519, 413038, 826076, 1032595, 1652152, 2065190, 3304304, 3510823, 4130380, 7021646, 8260760, 14043292, 16521520, 17554115, 28086584, 35108230, 56173168, 70216460, 140432920, 280865840]

約数ペア:

[(1, 280865840), (2, 140432920), (4, 70216460), (5, 56173168), (8, 35108230), (10, 28086584), (16, 17554115), (17, 16521520), (20, 14043292), (34, 8260760), (40, 7021646), (68, 4130380), (80, 3510823), (85, 3304304), (136, 2065190), (170, 1652152), (272, 1032595), (340, 826076), (680, 413038), (1360, 206519)]