20485504

素因数分解:

$2^7\times {\mathrm{13}}^2\times {\mathrm{947}}^1$

素因数の和:987

約数の個数: 48

約数和(自身を含む): 44238420

約数和(自身を除く): 23752916

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 169, 208, 338, 416, 676, 832, 947, 1352, 1664, 1894, 2704, 3788, 5408, 7576, 10816, 12311, 15152, 21632, 24622, 30304, 49244, 60608, 98488, 121216, 160043, 196976, 320086, 393952, 640172, 787904, 1280344, 1575808, 2560688, 5121376, 10242752, 20485504]

約数ペア:

[(1, 20485504), (2, 10242752), (4, 5121376), (8, 2560688), (13, 1575808), (16, 1280344), (26, 787904), (32, 640172), (52, 393952), (64, 320086), (104, 196976), (128, 160043), (169, 121216), (208, 98488), (338, 60608), (416, 49244), (676, 30304), (832, 24622), (947, 21632), (1352, 15152), (1664, 12311), (1894, 10816), (2704, 7576), (3788, 5408)]