20655180

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{97}}^1$

素因数の和:145

約数の個数: 216

約数和(自身を含む): 78335712

約数和(自身を除く): 57680532

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 97, 105, 117, 126, 130, 140, 156, 169, 180, 182, 194, 195, 210, 234, 252, 260, 273, 291, 315, 338, 364, 388, 390, 420, 455, 468, 485, 507, 546, 582, 585, 630, 676, 679, 780, 819, 845, 873, 910, 970, 1014, 1092, 1164, 1170, 1183, 1260, 1261, 1358, 1365, 1455, 1521, 1638, 1690, 1746, 1820, 1940, 2028, 2037, 2340, 2366, 2522, 2535, 2716, 2730, 2910, 3042, 3276, 3380, 3395, 3492, 3549, 3783, 4074, 4095, 4365, 4732, 5044, 5070, 5460, 5820, 5915, 6084, 6111, 6305, 6790, 7098, 7566, 7605, 8148, 8190, 8730, 8827, 10140, 10185, 10647, 11349, 11830, 12222, 12610, 13580, 14196, 15132, 15210, 16380, 16393, 17460, 17654, 17745, 18915, 20370, 21294, 22698, 23660, 24444, 25220, 26481, 30420, 30555, 32786, 35308, 35490, 37830, 40740, 42588, 44135, 45396, 49179, 52962, 53235, 56745, 61110, 65572, 70980, 75660, 79443, 81965, 88270, 98358, 105924, 106470, 113490, 114751, 122220, 132405, 147537, 158886, 163930, 176540, 196716, 212940, 226980, 229502, 245895, 264810, 295074, 317772, 327860, 344253, 397215, 459004, 491790, 529620, 573755, 590148, 688506, 737685, 794430, 983580, 1032759, 1147510, 1377012, 1475370, 1588860, 1721265, 2065518, 2295020, 2950740, 3442530, 4131036, 5163795, 6885060, 10327590, 20655180]

約数ペア:

[(1, 20655180), (2, 10327590), (3, 6885060), (4, 5163795), (5, 4131036), (6, 3442530), (7, 2950740), (9, 2295020), (10, 2065518), (12, 1721265), (13, 1588860), (14, 1475370), (15, 1377012), (18, 1147510), (20, 1032759), (21, 983580), (26, 794430), (28, 737685), (30, 688506), (35, 590148), (36, 573755), (39, 529620), (42, 491790), (45, 459004), (52, 397215), (60, 344253), (63, 327860), (65, 317772), (70, 295074), (78, 264810), (84, 245895), (90, 229502), (91, 226980), (97, 212940), (105, 196716), (117, 176540), (126, 163930), (130, 158886), (140, 147537), (156, 132405), (169, 122220), (180, 114751), (182, 113490), (194, 106470), (195, 105924), (210, 98358), (234, 88270), (252, 81965), (260, 79443), (273, 75660), (291, 70980), (315, 65572), (338, 61110), (364, 56745), (388, 53235), (390, 52962), (420, 49179), (455, 45396), (468, 44135), (485, 42588), (507, 40740), (546, 37830), (582, 35490), (585, 35308), (630, 32786), (676, 30555), (679, 30420), (780, 26481), (819, 25220), (845, 24444), (873, 23660), (910, 22698), (970, 21294), (1014, 20370), (1092, 18915), (1164, 17745), (1170, 17654), (1183, 17460), (1260, 16393), (1261, 16380), (1358, 15210), (1365, 15132), (1455, 14196), (1521, 13580), (1638, 12610), (1690, 12222), (1746, 11830), (1820, 11349), (1940, 10647), (2028, 10185), (2037, 10140), (2340, 8827), (2366, 8730), (2522, 8190), (2535, 8148), (2716, 7605), (2730, 7566), (2910, 7098), (3042, 6790), (3276, 6305), (3380, 6111), (3395, 6084), (3492, 5915), (3549, 5820), (3783, 5460), (4074, 5070), (4095, 5044), (4365, 4732)]