128878740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16651}}^1$

素因数の和:16709

約数の個数: 72

約数和(自身を含む): 400047648

約数和(自身を除く): 271168908

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 3870, 7740, 16651, 33302, 49953, 66604, 83255, 99906, 149859, 166510, 199812, 249765, 299718, 333020, 499530, 599436, 715993, 749295, 999060, 1431986, 1498590, 2147979, 2863972, 2997180, 3579965, 4295958, 6443937, 7159930, 8591916, 10739895, 12887874, 14319860, 21479790, 25775748, 32219685, 42959580, 64439370, 128878740]

約数ペア:

[(1, 128878740), (2, 64439370), (3, 42959580), (4, 32219685), (5, 25775748), (6, 21479790), (9, 14319860), (10, 12887874), (12, 10739895), (15, 8591916), (18, 7159930), (20, 6443937), (30, 4295958), (36, 3579965), (43, 2997180), (45, 2863972), (60, 2147979), (86, 1498590), (90, 1431986), (129, 999060), (172, 749295), (180, 715993), (215, 599436), (258, 499530), (387, 333020), (430, 299718), (516, 249765), (645, 199812), (774, 166510), (860, 149859), (1290, 99906), (1548, 83255), (1935, 66604), (2580, 49953), (3870, 33302), (7740, 16651)]