21764816

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:411

約数の個数: 40

約数和(自身を含む): 43509120

約数和(自身を除く): 21744304

約数列:

[1, 2, 4, 8, 16, 67, 79, 134, 158, 257, 268, 316, 514, 536, 632, 1028, 1072, 1264, 2056, 4112, 5293, 10586, 17219, 20303, 21172, 34438, 40606, 42344, 68876, 81212, 84688, 137752, 162424, 275504, 324848, 1360301, 2720602, 5441204, 10882408, 21764816]

約数ペア:

[(1, 21764816), (2, 10882408), (4, 5441204), (8, 2720602), (16, 1360301), (67, 324848), (79, 275504), (134, 162424), (158, 137752), (257, 84688), (268, 81212), (316, 68876), (514, 42344), (536, 40606), (632, 34438), (1028, 21172), (1072, 20303), (1264, 17219), (2056, 10586), (4112, 5293)]