21683684

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{631}}^1$

素因数の和:728

約数の個数: 36

約数和(自身を含む): 42364224

約数和(自身を除く): 20680540

約数列:

[1, 2, 4, 11, 22, 44, 71, 121, 142, 242, 284, 484, 631, 781, 1262, 1562, 2524, 3124, 6941, 8591, 13882, 17182, 27764, 34364, 44801, 76351, 89602, 152702, 179204, 305404, 492811, 985622, 1971244, 5420921, 10841842, 21683684]

約数ペア:

[(1, 21683684), (2, 10841842), (4, 5420921), (11, 1971244), (22, 985622), (44, 492811), (71, 305404), (121, 179204), (142, 152702), (242, 89602), (284, 76351), (484, 44801), (631, 34364), (781, 27764), (1262, 17182), (1562, 13882), (2524, 8591), (3124, 6941)]