81905880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{347}}^1$

素因数の和:649

約数の個数: 128

約数和(自身を含む): 282631680

約数和(自身を除く): 200725800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 281, 347, 420, 562, 694, 840, 843, 1041, 1124, 1388, 1405, 1686, 1735, 1967, 2082, 2248, 2429, 2776, 2810, 3372, 3470, 3934, 4164, 4215, 4858, 5205, 5620, 5901, 6744, 6940, 7287, 7868, 8328, 8430, 9716, 9835, 10410, 11240, 11802, 12145, 13880, 14574, 15736, 16860, 19432, 19670, 20820, 23604, 24290, 29148, 29505, 33720, 36435, 39340, 41640, 47208, 48580, 58296, 59010, 72870, 78680, 97160, 97507, 118020, 145740, 195014, 236040, 291480, 292521, 390028, 487535, 585042, 682549, 780056, 975070, 1170084, 1365098, 1462605, 1950140, 2047647, 2340168, 2730196, 2925210, 3412745, 3900280, 4095294, 5460392, 5850420, 6825490, 8190588, 10238235, 11700840, 13650980, 16381176, 20476470, 27301960, 40952940, 81905880]

約数ペア:

[(1, 81905880), (2, 40952940), (3, 27301960), (4, 20476470), (5, 16381176), (6, 13650980), (7, 11700840), (8, 10238235), (10, 8190588), (12, 6825490), (14, 5850420), (15, 5460392), (20, 4095294), (21, 3900280), (24, 3412745), (28, 2925210), (30, 2730196), (35, 2340168), (40, 2047647), (42, 1950140), (56, 1462605), (60, 1365098), (70, 1170084), (84, 975070), (105, 780056), (120, 682549), (140, 585042), (168, 487535), (210, 390028), (280, 292521), (281, 291480), (347, 236040), (420, 195014), (562, 145740), (694, 118020), (840, 97507), (843, 97160), (1041, 78680), (1124, 72870), (1388, 59010), (1405, 58296), (1686, 48580), (1735, 47208), (1967, 41640), (2082, 39340), (2248, 36435), (2429, 33720), (2776, 29505), (2810, 29148), (3372, 24290), (3470, 23604), (3934, 20820), (4164, 19670), (4215, 19432), (4858, 16860), (5205, 15736), (5620, 14574), (5901, 13880), (6744, 12145), (6940, 11802), (7287, 11240), (7868, 10410), (8328, 9835), (8430, 9716)]