20287136

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{547}}^1$

素因数の和:637

約数の個数: 48

約数和(自身を含む): 42809760

約数和(自身を除く): 22522624

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 61, 76, 122, 152, 244, 304, 488, 547, 608, 976, 1094, 1159, 1952, 2188, 2318, 4376, 4636, 8752, 9272, 10393, 17504, 18544, 20786, 33367, 37088, 41572, 66734, 83144, 133468, 166288, 266936, 332576, 533872, 633973, 1067744, 1267946, 2535892, 5071784, 10143568, 20287136]

約数ペア:

[(1, 20287136), (2, 10143568), (4, 5071784), (8, 2535892), (16, 1267946), (19, 1067744), (32, 633973), (38, 533872), (61, 332576), (76, 266936), (122, 166288), (152, 133468), (244, 83144), (304, 66734), (488, 41572), (547, 37088), (608, 33367), (976, 20786), (1094, 18544), (1159, 17504), (1952, 10393), (2188, 9272), (2318, 8752), (4376, 4636)]