81656666

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{353}}^1$

素因数の和:447

約数の個数: 64

約数和(自身を含む): 159860736

約数和(自身を除く): 78204070

約数列:

[1, 2, 7, 13, 14, 26, 31, 41, 62, 82, 91, 182, 217, 287, 353, 403, 434, 533, 574, 706, 806, 1066, 1271, 2471, 2542, 2821, 3731, 4589, 4942, 5642, 7462, 8897, 9178, 10943, 14473, 16523, 17794, 21886, 28946, 32123, 33046, 64246, 76601, 101311, 115661, 142259, 153202, 188149, 202622, 231322, 284518, 376298, 448663, 897326, 995813, 1317043, 1991626, 2634086, 3140641, 5832619, 6281282, 11665238, 40828333, 81656666]

約数ペア:

[(1, 81656666), (2, 40828333), (7, 11665238), (13, 6281282), (14, 5832619), (26, 3140641), (31, 2634086), (41, 1991626), (62, 1317043), (82, 995813), (91, 897326), (182, 448663), (217, 376298), (287, 284518), (353, 231322), (403, 202622), (434, 188149), (533, 153202), (574, 142259), (706, 115661), (806, 101311), (1066, 76601), (1271, 64246), (2471, 33046), (2542, 32123), (2821, 28946), (3731, 21886), (4589, 17794), (4942, 16523), (5642, 14473), (7462, 10943), (8897, 9178)]