20625904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1871}}^1$

素因数の和:1945

約数の個数: 40

約数和(自身を含む): 43872192

約数和(自身を除く): 23246288

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1871, 2756, 3742, 5512, 7484, 11024, 14968, 24323, 29936, 48646, 97292, 99163, 194584, 198326, 389168, 396652, 793304, 1289119, 1586608, 2578238, 5156476, 10312952, 20625904]

約数ペア:

[(1, 20625904), (2, 10312952), (4, 5156476), (8, 2578238), (13, 1586608), (16, 1289119), (26, 793304), (52, 396652), (53, 389168), (104, 198326), (106, 194584), (208, 99163), (212, 97292), (424, 48646), (689, 29936), (848, 24323), (1378, 14968), (1871, 11024), (2756, 7484), (3742, 5512)]