20921166

素因数分解:

$2^1\times 3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{971}}^1$

素因数の和:1011

約数の個数: 80

約数和(自身を含む): 56453760

約数和(自身を除く): 35532594

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 19, 21, 27, 38, 42, 54, 57, 63, 81, 114, 126, 133, 162, 171, 189, 266, 342, 378, 399, 513, 567, 798, 971, 1026, 1134, 1197, 1539, 1942, 2394, 2913, 3078, 3591, 5826, 6797, 7182, 8739, 10773, 13594, 17478, 18449, 20391, 21546, 26217, 36898, 40782, 52434, 55347, 61173, 78651, 110694, 122346, 129143, 157302, 166041, 183519, 258286, 332082, 367038, 387429, 498123, 550557, 774858, 996246, 1101114, 1162287, 1494369, 2324574, 2988738, 3486861, 6973722, 10460583, 20921166]

約数ペア:

[(1, 20921166), (2, 10460583), (3, 6973722), (6, 3486861), (7, 2988738), (9, 2324574), (14, 1494369), (18, 1162287), (19, 1101114), (21, 996246), (27, 774858), (38, 550557), (42, 498123), (54, 387429), (57, 367038), (63, 332082), (81, 258286), (114, 183519), (126, 166041), (133, 157302), (162, 129143), (171, 122346), (189, 110694), (266, 78651), (342, 61173), (378, 55347), (399, 52434), (513, 40782), (567, 36898), (798, 26217), (971, 21546), (1026, 20391), (1134, 18449), (1197, 17478), (1539, 13594), (1942, 10773), (2394, 8739), (2913, 7182), (3078, 6797), (3591, 5826)]