81419940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{179}}^1$

素因数の和:239

約数の個数: 216

約数和(自身を含む): 299557440

約数和(自身を除く): 218137500

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 57, 60, 63, 70, 76, 84, 90, 95, 105, 114, 126, 133, 140, 171, 179, 180, 190, 210, 228, 252, 266, 285, 315, 342, 358, 361, 380, 399, 420, 532, 537, 570, 630, 665, 684, 716, 722, 798, 855, 895, 1074, 1083, 1140, 1197, 1253, 1260, 1330, 1444, 1596, 1611, 1710, 1790, 1805, 1995, 2148, 2166, 2394, 2506, 2527, 2660, 2685, 3222, 3249, 3401, 3420, 3580, 3610, 3759, 3990, 4332, 4788, 5012, 5054, 5370, 5415, 5985, 6265, 6444, 6498, 6802, 7220, 7518, 7581, 7980, 8055, 10108, 10203, 10740, 10830, 11277, 11970, 12530, 12635, 12996, 13604, 15036, 15162, 16110, 16245, 17005, 18795, 20406, 21660, 22554, 22743, 23807, 23940, 25060, 25270, 30324, 30609, 32220, 32490, 34010, 37590, 37905, 40812, 45108, 45486, 47614, 50540, 51015, 56385, 61218, 64619, 64980, 68020, 71421, 75180, 75810, 90972, 95228, 102030, 112770, 113715, 119035, 122436, 129238, 142842, 151620, 153045, 193857, 204060, 214263, 225540, 227430, 238070, 258476, 285684, 306090, 323095, 357105, 387714, 428526, 452333, 454860, 476140, 581571, 612180, 646190, 714210, 775428, 857052, 904666, 969285, 1071315, 1163142, 1292380, 1356999, 1428420, 1809332, 1938570, 2142630, 2261665, 2326284, 2713998, 2907855, 3877140, 4070997, 4285260, 4523330, 5427996, 5815710, 6784995, 8141994, 9046660, 11631420, 13569990, 16283988, 20354985, 27139980, 40709970, 81419940]

約数ペア:

[(1, 81419940), (2, 40709970), (3, 27139980), (4, 20354985), (5, 16283988), (6, 13569990), (7, 11631420), (9, 9046660), (10, 8141994), (12, 6784995), (14, 5815710), (15, 5427996), (18, 4523330), (19, 4285260), (20, 4070997), (21, 3877140), (28, 2907855), (30, 2713998), (35, 2326284), (36, 2261665), (38, 2142630), (42, 1938570), (45, 1809332), (57, 1428420), (60, 1356999), (63, 1292380), (70, 1163142), (76, 1071315), (84, 969285), (90, 904666), (95, 857052), (105, 775428), (114, 714210), (126, 646190), (133, 612180), (140, 581571), (171, 476140), (179, 454860), (180, 452333), (190, 428526), (210, 387714), (228, 357105), (252, 323095), (266, 306090), (285, 285684), (315, 258476), (342, 238070), (358, 227430), (361, 225540), (380, 214263), (399, 204060), (420, 193857), (532, 153045), (537, 151620), (570, 142842), (630, 129238), (665, 122436), (684, 119035), (716, 113715), (722, 112770), (798, 102030), (855, 95228), (895, 90972), (1074, 75810), (1083, 75180), (1140, 71421), (1197, 68020), (1253, 64980), (1260, 64619), (1330, 61218), (1444, 56385), (1596, 51015), (1611, 50540), (1710, 47614), (1790, 45486), (1805, 45108), (1995, 40812), (2148, 37905), (2166, 37590), (2394, 34010), (2506, 32490), (2527, 32220), (2660, 30609), (2685, 30324), (3222, 25270), (3249, 25060), (3401, 23940), (3420, 23807), (3580, 22743), (3610, 22554), (3759, 21660), (3990, 20406), (4332, 18795), (4788, 17005), (5012, 16245), (5054, 16110), (5370, 15162), (5415, 15036), (5985, 13604), (6265, 12996), (6444, 12635), (6498, 12530), (6802, 11970), (7220, 11277), (7518, 10830), (7581, 10740), (7980, 10203), (8055, 10108)]