20781516

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{449}}^1$

素因数の和:511

約数の個数: 96

約数和(自身を含む): 60480000

約数和(自身を除く): 39698484

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 19, 21, 28, 29, 38, 42, 57, 58, 76, 84, 87, 114, 116, 133, 174, 203, 228, 266, 348, 399, 406, 449, 532, 551, 609, 798, 812, 898, 1102, 1218, 1347, 1596, 1653, 1796, 2204, 2436, 2694, 3143, 3306, 3857, 5388, 6286, 6612, 7714, 8531, 9429, 11571, 12572, 13021, 15428, 17062, 18858, 23142, 25593, 26042, 34124, 37716, 39063, 46284, 51186, 52084, 59717, 78126, 91147, 102372, 119434, 156252, 179151, 182294, 238868, 247399, 273441, 358302, 364588, 494798, 546882, 716604, 742197, 989596, 1093764, 1484394, 1731793, 2968788, 3463586, 5195379, 6927172, 10390758, 20781516]

約数ペア:

[(1, 20781516), (2, 10390758), (3, 6927172), (4, 5195379), (6, 3463586), (7, 2968788), (12, 1731793), (14, 1484394), (19, 1093764), (21, 989596), (28, 742197), (29, 716604), (38, 546882), (42, 494798), (57, 364588), (58, 358302), (76, 273441), (84, 247399), (87, 238868), (114, 182294), (116, 179151), (133, 156252), (174, 119434), (203, 102372), (228, 91147), (266, 78126), (348, 59717), (399, 52084), (406, 51186), (449, 46284), (532, 39063), (551, 37716), (609, 34124), (798, 26042), (812, 25593), (898, 23142), (1102, 18858), (1218, 17062), (1347, 15428), (1596, 13021), (1653, 12572), (1796, 11571), (2204, 9429), (2436, 8531), (2694, 7714), (3143, 6612), (3306, 6286), (3857, 5388)]