20578320

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{1361}}^1$

素因数の和:1390

約数の個数: 160

約数和(自身を含む): 81066240

約数和(自身を除く): 60487920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 84, 90, 105, 108, 112, 120, 126, 135, 140, 144, 168, 180, 189, 210, 216, 240, 252, 270, 280, 315, 336, 360, 378, 420, 432, 504, 540, 560, 630, 720, 756, 840, 945, 1008, 1080, 1260, 1361, 1512, 1680, 1890, 2160, 2520, 2722, 3024, 3780, 4083, 5040, 5444, 6805, 7560, 8166, 9527, 10888, 12249, 13610, 15120, 16332, 19054, 20415, 21776, 24498, 27220, 28581, 32664, 36747, 38108, 40830, 47635, 48996, 54440, 57162, 61245, 65328, 73494, 76216, 81660, 85743, 95270, 97992, 108880, 114324, 122490, 142905, 146988, 152432, 163320, 171486, 183735, 190540, 195984, 228648, 244980, 257229, 285810, 293976, 326640, 342972, 367470, 381080, 428715, 457296, 489960, 514458, 571620, 587952, 685944, 734940, 762160, 857430, 979920, 1028916, 1143240, 1286145, 1371888, 1469880, 1714860, 2057832, 2286480, 2572290, 2939760, 3429720, 4115664, 5144580, 6859440, 10289160, 20578320]

約数ペア:

[(1, 20578320), (2, 10289160), (3, 6859440), (4, 5144580), (5, 4115664), (6, 3429720), (7, 2939760), (8, 2572290), (9, 2286480), (10, 2057832), (12, 1714860), (14, 1469880), (15, 1371888), (16, 1286145), (18, 1143240), (20, 1028916), (21, 979920), (24, 857430), (27, 762160), (28, 734940), (30, 685944), (35, 587952), (36, 571620), (40, 514458), (42, 489960), (45, 457296), (48, 428715), (54, 381080), (56, 367470), (60, 342972), (63, 326640), (70, 293976), (72, 285810), (80, 257229), (84, 244980), (90, 228648), (105, 195984), (108, 190540), (112, 183735), (120, 171486), (126, 163320), (135, 152432), (140, 146988), (144, 142905), (168, 122490), (180, 114324), (189, 108880), (210, 97992), (216, 95270), (240, 85743), (252, 81660), (270, 76216), (280, 73494), (315, 65328), (336, 61245), (360, 57162), (378, 54440), (420, 48996), (432, 47635), (504, 40830), (540, 38108), (560, 36747), (630, 32664), (720, 28581), (756, 27220), (840, 24498), (945, 21776), (1008, 20415), (1080, 19054), (1260, 16332), (1361, 15120), (1512, 13610), (1680, 12249), (1890, 10888), (2160, 9527), (2520, 8166), (2722, 7560), (3024, 6805), (3780, 5444), (4083, 5040)]