81943280

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7369}}^1$

素因数の和:7521

約数の個数: 40

約数和(自身を含む): 191914800

約数和(自身を除く): 109971520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 2224, 2780, 5560, 7369, 11120, 14738, 29476, 36845, 58952, 73690, 117904, 147380, 294760, 589520, 1024291, 2048582, 4097164, 5121455, 8194328, 10242910, 16388656, 20485820, 40971640, 81943280]

約数ペア:

[(1, 81943280), (2, 40971640), (4, 20485820), (5, 16388656), (8, 10242910), (10, 8194328), (16, 5121455), (20, 4097164), (40, 2048582), (80, 1024291), (139, 589520), (278, 294760), (556, 147380), (695, 117904), (1112, 73690), (1390, 58952), (2224, 36845), (2780, 29476), (5560, 14738), (7369, 11120)]