19900980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2$

素因数の和:91

約数の個数: 216

約数和(自身を含む): 72465120

約数和(自身を除く): 52564140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 19, 20, 22, 23, 30, 33, 36, 38, 44, 45, 46, 55, 57, 60, 66, 69, 76, 90, 92, 95, 99, 110, 114, 115, 132, 138, 165, 171, 180, 190, 198, 207, 209, 220, 228, 230, 253, 276, 285, 330, 342, 345, 380, 396, 414, 418, 437, 460, 495, 506, 529, 570, 627, 660, 684, 690, 759, 828, 836, 855, 874, 990, 1012, 1035, 1045, 1058, 1140, 1254, 1265, 1311, 1380, 1518, 1587, 1710, 1748, 1881, 1980, 2070, 2090, 2116, 2185, 2277, 2508, 2530, 2622, 2645, 3036, 3135, 3174, 3420, 3762, 3795, 3933, 4140, 4180, 4370, 4554, 4761, 4807, 5060, 5244, 5290, 5819, 6270, 6348, 6555, 7524, 7590, 7866, 7935, 8740, 9108, 9405, 9522, 9614, 10051, 10580, 11385, 11638, 12540, 13110, 14421, 15180, 15732, 15870, 17457, 18810, 19044, 19228, 19665, 20102, 22770, 23276, 23805, 24035, 26220, 28842, 29095, 30153, 31740, 34914, 37620, 39330, 40204, 43263, 45540, 47610, 48070, 50255, 52371, 57684, 58190, 60306, 69828, 72105, 78660, 86526, 87285, 90459, 95220, 96140, 100510, 104742, 110561, 116380, 120612, 144210, 150765, 173052, 174570, 180918, 201020, 209484, 216315, 221122, 261855, 288420, 301530, 331683, 349140, 361836, 432630, 442244, 452295, 523710, 552805, 603060, 663366, 865260, 904590, 995049, 1047420, 1105610, 1326732, 1658415, 1809180, 1990098, 2211220, 3316830, 3980196, 4975245, 6633660, 9950490, 19900980]

約数ペア:

[(1, 19900980), (2, 9950490), (3, 6633660), (4, 4975245), (5, 3980196), (6, 3316830), (9, 2211220), (10, 1990098), (11, 1809180), (12, 1658415), (15, 1326732), (18, 1105610), (19, 1047420), (20, 995049), (22, 904590), (23, 865260), (30, 663366), (33, 603060), (36, 552805), (38, 523710), (44, 452295), (45, 442244), (46, 432630), (55, 361836), (57, 349140), (60, 331683), (66, 301530), (69, 288420), (76, 261855), (90, 221122), (92, 216315), (95, 209484), (99, 201020), (110, 180918), (114, 174570), (115, 173052), (132, 150765), (138, 144210), (165, 120612), (171, 116380), (180, 110561), (190, 104742), (198, 100510), (207, 96140), (209, 95220), (220, 90459), (228, 87285), (230, 86526), (253, 78660), (276, 72105), (285, 69828), (330, 60306), (342, 58190), (345, 57684), (380, 52371), (396, 50255), (414, 48070), (418, 47610), (437, 45540), (460, 43263), (495, 40204), (506, 39330), (529, 37620), (570, 34914), (627, 31740), (660, 30153), (684, 29095), (690, 28842), (759, 26220), (828, 24035), (836, 23805), (855, 23276), (874, 22770), (990, 20102), (1012, 19665), (1035, 19228), (1045, 19044), (1058, 18810), (1140, 17457), (1254, 15870), (1265, 15732), (1311, 15180), (1380, 14421), (1518, 13110), (1587, 12540), (1710, 11638), (1748, 11385), (1881, 10580), (1980, 10051), (2070, 9614), (2090, 9522), (2116, 9405), (2185, 9108), (2277, 8740), (2508, 7935), (2530, 7866), (2622, 7590), (2645, 7524), (3036, 6555), (3135, 6348), (3174, 6270), (3420, 5819), (3762, 5290), (3795, 5244), (3933, 5060), (4140, 4807), (4180, 4761), (4370, 4554)]