18756720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{239}}^1$

素因数の和:367

約数の個数: 120

約数和(自身を含む): 63835200

約数和(自身を除く): 45078480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 109, 120, 144, 180, 218, 239, 240, 327, 360, 436, 478, 545, 654, 717, 720, 872, 956, 981, 1090, 1195, 1308, 1434, 1635, 1744, 1912, 1962, 2151, 2180, 2390, 2616, 2868, 3270, 3585, 3824, 3924, 4302, 4360, 4780, 4905, 5232, 5736, 6540, 7170, 7848, 8604, 8720, 9560, 9810, 10755, 11472, 13080, 14340, 15696, 17208, 19120, 19620, 21510, 26051, 26160, 28680, 34416, 39240, 43020, 52102, 57360, 78153, 78480, 86040, 104204, 130255, 156306, 172080, 208408, 234459, 260510, 312612, 390765, 416816, 468918, 521020, 625224, 781530, 937836, 1042040, 1172295, 1250448, 1563060, 1875672, 2084080, 2344590, 3126120, 3751344, 4689180, 6252240, 9378360, 18756720]

約数ペア:

[(1, 18756720), (2, 9378360), (3, 6252240), (4, 4689180), (5, 3751344), (6, 3126120), (8, 2344590), (9, 2084080), (10, 1875672), (12, 1563060), (15, 1250448), (16, 1172295), (18, 1042040), (20, 937836), (24, 781530), (30, 625224), (36, 521020), (40, 468918), (45, 416816), (48, 390765), (60, 312612), (72, 260510), (80, 234459), (90, 208408), (109, 172080), (120, 156306), (144, 130255), (180, 104204), (218, 86040), (239, 78480), (240, 78153), (327, 57360), (360, 52102), (436, 43020), (478, 39240), (545, 34416), (654, 28680), (717, 26160), (720, 26051), (872, 21510), (956, 19620), (981, 19120), (1090, 17208), (1195, 15696), (1308, 14340), (1434, 13080), (1635, 11472), (1744, 10755), (1912, 9810), (1962, 9560), (2151, 8720), (2180, 8604), (2390, 7848), (2616, 7170), (2868, 6540), (3270, 5736), (3585, 5232), (3824, 4905), (3924, 4780), (4302, 4360)]