21768568

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{2389}}^1$

素因数の和:2479

約数の個数: 32

約数和(自身を含む): 43880400

約数和(自身を除く): 22111832

約数列:

[1, 2, 4, 8, 17, 34, 67, 68, 134, 136, 268, 536, 1139, 2278, 2389, 4556, 4778, 9112, 9556, 19112, 40613, 81226, 160063, 162452, 320126, 324904, 640252, 1280504, 2721071, 5442142, 10884284, 21768568]

約数ペア:

[(1, 21768568), (2, 10884284), (4, 5442142), (8, 2721071), (17, 1280504), (34, 640252), (67, 324904), (68, 320126), (134, 162452), (136, 160063), (268, 81226), (536, 40613), (1139, 19112), (2278, 9556), (2389, 9112), (4556, 4778)]