12781951

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 17031168

約数和(自身を除く): 4249217

約数列:

[1, 7, 13, 23, 31, 91, 161, 197, 217, 299, 403, 713, 1379, 2093, 2561, 2821, 4531, 4991, 6107, 9269, 17927, 31717, 42749, 58903, 64883, 79391, 140461, 412321, 555737, 983227, 1825993, 12781951]

約数ペア:

[(1, 12781951), (7, 1825993), (13, 983227), (23, 555737), (31, 412321), (91, 140461), (161, 79391), (197, 64883), (217, 58903), (299, 42749), (403, 31717), (713, 17927), (1379, 9269), (2093, 6107), (2561, 4991), (2821, 4531)]